Cmdpal extension: Powertoys extension for cmdpal (#44006)

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fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request

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## PR Checklist

- [ ] Closes: #xxx
<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Installer built, and every command works as expected,
Now use sparse app deployment, so we don't need an extra msix

---------

Co-authored-by: kaitao-ms <kaitao1105@gmail.com>

src/modules/Workspaces/Workspaces.ModuleServices/IWorkspaceService.cs

@@ -0,0 +1,22 @@
+// 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 PowerToys.ModuleContracts;
+using WorkspacesCsharpLibrary.Data;
+
+namespace Workspaces.ModuleServices;
+
+/// <summary>
+/// Workspaces-specific operations.
+/// </summary>
+public interface IWorkspaceService : IModuleService
+{
+    Task<OperationResult> LaunchWorkspaceAsync(string workspaceId, CancellationToken cancellationToken = default);
+
+    Task<OperationResult> LaunchEditorAsync(CancellationToken cancellationToken = default);
+
+    Task<OperationResult> SnapshotAsync(string? targetPath = null, CancellationToken cancellationToken = default);
+
+    Task<OperationResult<IReadOnlyList<ProjectWrapper>>> GetWorkspacesAsync(CancellationToken cancellationToken = default);
+}

src/modules/Workspaces/Workspaces.ModuleServices/WorkspaceService.cs

@@ -0,0 +1,96 @@
+// 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.Diagnostics;
+using System.IO;
+using Common.UI;
+using ManagedCommon;
+using PowerToys.Interop;
+using PowerToys.ModuleContracts;
+using WorkspacesCsharpLibrary.Data;
+
+namespace Workspaces.ModuleServices;
+
+/// <summary>
+/// Implementation of workspace actions for reuse across hosts.
+/// </summary>
+public sealed class WorkspaceService : ModuleServiceBase, IWorkspaceService
+{
+    public static WorkspaceService Instance { get; } = new();
+
+    public override string Key => SettingsDeepLink.SettingsWindow.Workspaces.ToString();
+
+    protected override SettingsDeepLink.SettingsWindow SettingsWindow => SettingsDeepLink.SettingsWindow.Workspaces;
+
+    public override Task<OperationResult> LaunchAsync(CancellationToken cancellationToken = default)
+    {
+        // Treat launch as invoking the Workspaces editor.
+        return LaunchEditorAsync(cancellationToken);
+    }
+
+    public Task<OperationResult> LaunchEditorAsync(CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            using var eventHandle = new EventWaitHandle(false, EventResetMode.AutoReset, Constants.WorkspacesLaunchEditorEvent());
+            eventHandle.Set();
+            return Task.FromResult(OperationResult.Ok());
+        }
+        catch (Exception ex)
+        {
+            return Task.FromResult(OperationResult.Fail($"Failed to launch Workspaces editor: {ex.Message}"));
+        }
+    }
+
+    public Task<OperationResult> LaunchWorkspaceAsync(string workspaceId, CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(workspaceId))
+        {
+            return Task.FromResult(OperationResult.Fail("Workspace id is required."));
+        }
+
+        try
+        {
+            var powertoysBaseDir = PowerToysPathResolver.GetPowerToysInstallPath();
+            if (string.IsNullOrEmpty(powertoysBaseDir))
+            {
+                return Task.FromResult(OperationResult.Fail("PowerToys installation path not found."));
+            }
+
+            var launcherPath = Path.Combine(powertoysBaseDir, "PowerToys.WorkspacesLauncher.exe");
+            var startInfo = new ProcessStartInfo(launcherPath)
+            {
+                Arguments = workspaceId,
+                UseShellExecute = true,
+            };
+
+            Process.Start(startInfo);
+            return Task.FromResult(OperationResult.Ok());
+        }
+        catch (Exception ex)
+        {
+            return Task.FromResult(OperationResult.Fail($"Failed to launch workspace: {ex.Message}"));
+        }
+    }
+
+    public Task<OperationResult> SnapshotAsync(string? targetPath = null, CancellationToken cancellationToken = default)
+    {
+        // Snapshot orchestration is not yet exposed via events; provide a clear failure for now.
+        return Task.FromResult(OperationResult.Fail("Snapshot is not implemented for Workspaces."));
+    }
+
+    public Task<OperationResult<IReadOnlyList<ProjectWrapper>>> GetWorkspacesAsync(CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var items = WorkspacesStorage.Load();
+
+            return Task.FromResult(OperationResults.Ok<IReadOnlyList<ProjectWrapper>>(items));
+        }
+        catch (Exception ex)
+        {
+            return Task.FromResult(OperationResults.Fail<IReadOnlyList<ProjectWrapper>>($"Failed to read workspaces: {ex.Message}"));
+        }
+    }
+}

src/modules/Workspaces/Workspaces.ModuleServices/Workspaces.ModuleServices.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <!-- Look at Directory.Build.props in root for common stuff as well -->
+  <Import Project="..\..\..\Common.Dotnet.CsWinRT.props" />
+  <Import Project="..\..\..\Common.Dotnet.AotCompatibility.props" />
+
+  <PropertyGroup>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+    <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\common\ManagedCommon\ManagedCommon.csproj" />
+    <ProjectReference Include="..\..\..\common\interop\PowerToys.Interop.vcxproj" />
+    <ProjectReference Include="..\..\..\common\Common.UI\Common.UI.csproj" />
+    <ProjectReference Include="..\..\..\common\PowerToys.ModuleContracts\PowerToys.ModuleContracts.csproj" />
+    <ProjectReference Include="..\WorkspacesCsharpLibrary\WorkspacesCsharpLibrary.csproj" />
+  </ItemGroup>
+</Project>