Add the Command Palette module (#37908)

Windows Command Palette ("CmdPal") is the next iteration of PowerToys Run. With extensibility at its core, the Command Palette is your one-stop launcher to start _anything_.

By default, CmdPal is bound to <kbd>Win+Alt+Space</kbd>.

![cmdpal-pr-002](https://github.com/user-attachments/assets/5077ec04-1009-478a-92d6-0a30989d44ac)
![cmdpal-pr-003](https://github.com/user-attachments/assets/63b4762a-9c19-48eb-9242-18ea48240ba0)

----

This brings the current preview version of CmdPal into the upstream PowerToys repo. There are still lots of bugs to work out, but it's reached the state we're ready to start sharing it with the world. From here, we can further collaborate with the community on the features that are important, and ensuring that we've got a most robust API to enable developers to build whatever extensions they want. 

Most of the built-in PT Run modules have already been ported to CmdPal's extension API. Those include:
* Installed apps
* Shell commands
* File search (powered by the indexer)
* Windows Registry search
* Web search
* Windows Terminal Profiles
* Windows Services
* Windows settings


There are a couple new extensions built-in
* You can now search for packages on `winget` and install them right from the palette. This also powers searching for extensions for the palette
* The calculator has an entirely new implementation. This is currently less feature complete than the original PT Run one - we're looking forward to updating it to be more complete for future ingestion in Windows
* "Bookmarks" allow you to save shortcuts to files, folders, and webpages as top-level commands in the palette. 

We've got a bunch of other samples too, in this repo and elsewhere

### PowerToys specific notes

CmdPal will eventually graduate out of PowerToys to live as its own application, which is why it's implemented just a little differently than most other modules. Enabling CmdPal will install its `msix` package. 

The CI was minorly changed to support CmdPal version numbers independent of PowerToys itself. It doesn't make sense for us to start CmdPal at v0.90, and in the future, we want to be able to rev CmdPal independently of PT itself. 


Closes #3200, closes #3600, closes #7770, closes #34273, closes #36471, closes #20976, closes #14495
  
  
-----

TODOs et al


**Blocking:**
- [ ] Images and descriptions in Settings and OOBE need to be properly defined, as mentioned before
  - [ ] Niels is on it
- [x] Doesn't start properly from PowerToys unless the fix PR is merged.
  - https://github.com/zadjii-msft/PowerToys/pull/556 merged
- [x] I seem to lose focus a lot when I press on some limits, like between the search bar and the results.
  - This is https://github.com/zadjii-msft/PowerToys/issues/427
- [x] Turned off an extension like Calculator and it was still working.
  - Need to get rid of that toggle, it doesn't do anything currently
- [x] `ListViewModel.<FetchItems>` crash
  - Pretty confident that was fixed in https://github.com/zadjii-msft/PowerToys/pull/553

**Not blocking / improvements:**
- Show the shortcut through settings, as mentioned before, or create a button that would open CmdPalette settings.
- When PowerToys starts, CmdPalette is always shown if enabled. That's weird when just starting PowerToys/ logging in to the computer with PowerToys auto-start activated. I think this should at least be a setting.
- Needing to double press a result for it to do the default action seems quirky. If one is already selected, I think just pressing should be enough for it to do the action.
  - This is currently a setting, though we're thinking of changing the setting even more: https://github.com/zadjii-msft/PowerToys/issues/392
- There's no URI extension. Was surprised when typing a URL that it only proposed a web search.
- [x] There's no System commands extension. Was expecting to be able to quickly restart the computer by typing restart but it wasn't there.
  - This is in PR https://github.com/zadjii-msft/PowerToys/pull/452  
  
---------

Co-authored-by: joadoumie <98557455+joadoumie@users.noreply.github.com>
Co-authored-by: Jordi Adoumie <jordiadoumie@microsoft.com>
Co-authored-by: Mike Griese <zadjii@gmail.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Michael Hawker <24302614+michael-hawker@users.noreply.github.com>
Co-authored-by: Stefan Markovic <57057282+stefansjfw@users.noreply.github.com>
Co-authored-by: Seraphima <zykovas91@gmail.com>
Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>
Co-authored-by: Kristen Schau <47155823+krschau@users.noreply.github.com>
Co-authored-by: Eric Johnson <ericjohnson327@gmail.com>
Co-authored-by: Ethan Fang <ethanfang@microsoft.com>
Co-authored-by: Yu Leng (from Dev Box) <yuleng@microsoft.com>
Co-authored-by: Clint Rutkas <clint@rutkas.com>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ActivateSecondaryCommandMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to perform a list item's secondary command when the user presses ctrl+enter in the search box
+/// </summary>
+public record ActivateSecondaryCommandMessage
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ActivateSelectedListItemMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to perform a list item's command when the user presses enter in the search box
+/// </summary>
+public record ActivateSelectedListItemMessage
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ClearSearchMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record ClearSearchMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/DismissMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record DismissMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/FocusSearchBoxMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record FocusSearchBoxMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/GoHomeMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record GoHomeMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/HandleCommandResultMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record HandleCommandResultMessage(ExtensionObject<ICommandResult> Result)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/HideDetailsMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record HideDetailsMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/HotkeySummonMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record HotkeySummonMessage(string CommandId, IntPtr Hwnd)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/LaunchUriMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record LaunchUriMessage(Uri Uri)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/NavigateBackMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record NavigateBackMessage(bool FromBackspace = false)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/NavigateNextCommand.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to navigate to the next command in the page when pressing the Down key in the SearchBox.
+/// </summary>
+public record NavigateNextCommand
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/NavigatePreviousCommand.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to navigate to the previous command in the page when pressing the Down key in the SearchBox.
+/// </summary>
+public record NavigatePreviousCommand
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/OpenContextMenuMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to perform a list item's secondary command when the user presses ctrl+enter in the search box
+/// </summary>
+public record OpenContextMenuMessage
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/OpenSettingsMessage.cs

@@ -0,0 +1,11 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.BuiltinCommands;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record OpenSettingsMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/PerformCommandMessage.cs

@@ -0,0 +1,56 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to do a command - navigate to a page or invoke it
+/// </summary>
+public record PerformCommandMessage
+{
+    public ExtensionObject<ICommand> Command { get; }
+
+    public object? Context { get; }
+
+    public bool WithAnimation { get; set; } = true;
+
+    public PerformCommandMessage(ExtensionObject<ICommand> command)
+    {
+        Command = command;
+        Context = null;
+    }
+
+    public PerformCommandMessage(TopLevelCommandItemWrapper topLevelCommand)
+    {
+        Command = new(topLevelCommand.Command);
+        Context = null;
+    }
+
+    public PerformCommandMessage(ExtensionObject<ICommand> command, ExtensionObject<IListItem> context)
+    {
+        Command = command;
+        Context = context.Unsafe;
+    }
+
+    public PerformCommandMessage(ExtensionObject<ICommand> command, ExtensionObject<ICommandItem> context)
+    {
+        Command = command;
+        Context = context.Unsafe;
+    }
+
+    public PerformCommandMessage(ExtensionObject<ICommand> command, ExtensionObject<ICommandContextItem> context)
+    {
+        Command = command;
+        Context = context.Unsafe;
+    }
+
+    public PerformCommandMessage(ConfirmResultViewModel vm)
+    {
+        Command = vm.PrimaryCommand.Model;
+        Context = null;
+    }
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/QuitMessage.cs

@@ -0,0 +1,14 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.BuiltinCommands;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Message which closes the application. Used by <see cref="QuitCommand"/> via <see cref="BuiltInsCommandProvider"/>.
+/// </summary>
+public record QuitMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ReloadCommandsMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record ReloadCommandsMessage()
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ShowDetailsMessage.cs

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record ShowDetailsMessage(DetailsViewModel Details)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/ShowWindowMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record ShowWindowMessage(IntPtr Hwnd)
+{
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/UpdateCommandBarMessage.cs

@@ -0,0 +1,34 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.ComponentModel;
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+/// <summary>
+/// Used to update the command bar at the bottom to reflect the commands for a list item
+/// </summary>
+public record UpdateCommandBarMessage(ICommandBarContext? ViewModel)
+{
+}
+
+// Represents everything the command bar needs to know about to show command
+// buttons at the bottom.
+//
+// This is implemented by both ListItemViewModel and ContentPageViewModel,
+// the two things with sub-commands.
+public interface ICommandBarContext : INotifyPropertyChanged
+{
+    public IEnumerable<CommandContextItemViewModel> MoreCommands { get; }
+
+    public bool HasMoreCommands { get; }
+
+    public string SecondaryCommandName { get; }
+
+    public CommandItemViewModel? PrimaryCommand { get; }
+
+    public CommandItemViewModel? SecondaryCommand { get; }
+
+    public List<CommandContextItemViewModel> AllCommands { get; }
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/Messages/UpdateFallbackItemsMessage.cs

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CmdPal.UI.ViewModels.Messages;
+
+public record UpdateFallbackItemsMessage()
+{
+}