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/extensionsdk/Microsoft.CommandPalette.Extensions.Toolkit/DetailsCommands.cs

@@ -4,7 +4,7 @@
 
 namespace Microsoft.CommandPalette.Extensions.Toolkit;
 
-public partial class DetailsCommand : IDetailsCommand
+public partial class DetailsCommands : IDetailsCommands
 {
-    public ICommand? Command { get; set; }
+    public ICommand[]? Commands { get; set; }
 }

src/modules/cmdpal/extensionsdk/Microsoft.CommandPalette.Extensions/Microsoft.CommandPalette.Extensions.idl

@@ -182,8 +182,8 @@ namespace Microsoft.CommandPalette.Extensions
         String Text { get; };
     }
     [contract(Microsoft.CommandPalette.Extensions.ExtensionsContract, 1)]
-    interface IDetailsCommand requires IDetailsData {
-        ICommand Command { get; };
+    interface IDetailsCommands requires IDetailsData {
+        ICommand[] Commands { get; };
     }
     [uuid("58070392-02bb-4e89-9beb-47ceb8c3d741")]
     [contract(Microsoft.CommandPalette.Extensions.ExtensionsContract, 1)]