Users can now pin/unpin apps from the top of AllApps extension (#40544)

Users can now use Ctrl+P to toggle pinning and unpinning applications
from the top of the All Apps extension.

This pinned status persists through restarts & reboots.


https://github.com/user-attachments/assets/86895a38-7312-438a-9409-b50a85979d12

Reference: #40543

---------

Co-authored-by: Mike Griese <migrie@microsoft.com>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Apps/AppItem.cs

@@ -4,6 +4,7 @@
 
 using System.Collections.Generic;
 using Microsoft.CmdPal.Ext.Apps.Programs;
+using Microsoft.CommandPalette.Extensions;
 using Microsoft.CommandPalette.Extensions.Toolkit;
 
 namespace Microsoft.CmdPal.Ext.Apps;
@@ -26,7 +27,9 @@ internal sealed class AppItem
 
     public bool IsPackaged { get; set; }
 
-    public List<CommandContextItem>? Commands { get; set; }
+    public List<IContextItem>? Commands { get; set; }
+
+    public string AppIdentifier { get; set; } = string.Empty;
 
     public AppItem()
     {