CmdPal: Add history to the new run page (#40427)

_⚠️ targets #39955_

This adds history support to the new run page.

* It'll initialize the history with the history from the run dialog, if
there is any.
* Any new commands that are run, or files/dirs that are opened will also
get added to the history
* history will persist across reboots

src/modules/cmdpal/extensionsdk/Microsoft.CommandPalette.Extensions.Toolkit/ListHelpers.cs

@@ -43,7 +43,6 @@ public partial class ListHelpers
     }
 
     public static IEnumerable<T> FilterList<T>(IEnumerable<T> items, string query, Func<string, T, int> scoreFunction)
-        where T : class
     {
         var scores = items
             .Select(li => new Scored<T>() { Item = li, Score = scoreFunction(query, li) })

src/modules/cmdpal/extensionsdk/Microsoft.CommandPalette.Extensions.Toolkit/OpenUrlCommand.cs

@@ -4,7 +4,7 @@
 
 namespace Microsoft.CommandPalette.Extensions.Toolkit;
 
-public sealed partial class OpenUrlCommand : InvokableCommand
+public partial class OpenUrlCommand : InvokableCommand
 {
     private readonly string _target;