CmdPal: Implement IDetailsCommand in details (#39911)

Implemented IDetailsCommands in details. This will close #38339.

This works very similar to Tags in that it is a list of commands. This
was done to allow for styling without the 12 spacing of the
ItemsRepeater and looks like you'd find in the OS-inbox like:


![image](https://github.com/user-attachments/assets/97ee1952-13bb-4c8b-a074-0347b04e0c2c)


![image](https://github.com/user-attachments/assets/8f6f1f72-4ea0-441d-893e-ae26aabdc922)

Also added to our sample extension:


![image](https://github.com/user-attachments/assets/ab3ce521-3479-448f-b4d6-9dfd09feb24f)

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/DetailsCommandsViewModel.cs

@@ -0,0 +1,42 @@
+// 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;
+
+public partial class DetailsCommandsViewModel(
+    IDetailsElement _detailsElement,
+    WeakReference<IPageContext> context) : DetailsElementViewModel(_detailsElement, context)
+{
+    public List<CommandViewModel> Commands { get; private set; } = [];
+
+    public bool HasCommands => Commands.Count > 0;
+
+    private readonly ExtensionObject<IDetailsCommands> _dataModel =
+        new(_detailsElement.Data as IDetailsCommands);
+
+    public override void InitializeProperties()
+    {
+        base.InitializeProperties();
+        var model = _dataModel.Unsafe;
+        if (model == null)
+        {
+            return;
+        }
+
+        Commands = model
+            .Commands?
+            .Select(c =>
+            {
+                var vm = new CommandViewModel(c, PageContext);
+                vm.InitializeProperties();
+                return vm;
+            })
+            .ToList() ?? [];
+        UpdateProperty(nameof(HasCommands));
+        UpdateProperty(nameof(Commands));
+    }
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/DetailsViewModel.cs

@@ -49,6 +49,7 @@ public partial class DetailsViewModel(IDetails _details, WeakReference<IPageCont
                 {
                     IDetailsSeparator => new DetailsSeparatorViewModel(element, this.PageContext),
                     IDetailsLink => new DetailsLinkViewModel(element, this.PageContext),
+                    IDetailsCommands => new DetailsCommandsViewModel(element, this.PageContext),
                     IDetailsTags => new DetailsTagsViewModel(element, this.PageContext),
                     _ => null,
                 };