Add support for self scope

Bitvault/ConfirmItemActionViewModel.cs

@@ -1,10 +1,17 @@
-using Toolkit.Foundation;
+using CommunityToolkit.Mvvm.Input;
+using Toolkit.Foundation;
 
 namespace Bitvault;
 
+public record Test;
+
 public partial class ConfirmItemActionViewModel(IServiceProvider provider,
     IServiceFactory factory,
     IMediator mediator,
     IPublisher publisher,
     ISubscriber subscriber,
-    IDisposer disposer) : ObservableViewModel(provider, factory, mediator, publisher, subscriber, disposer);
+    IDisposer disposer) : ObservableViewModel(provider, factory, mediator, publisher, subscriber, disposer)
+{
+    [RelayCommand]
+    public async Task Invoke() => await Publisher.Publish(new Test());
+}