feat: Enhance Face AI upload functionality and UI

- Updated MainWindow.axaml to increase height and add new UI elements for SSH upload configuration.
- Implemented commands for opening source and destination paths in file explorer.
- Added FaceUploadPath and SSH configuration properties to DataModel and AiSettingsViewModel.
- Introduced validation for FaceUploadPath format and commands for uploading face encoder output.
- Enhanced PickerPreferenceService to manage SSH credentials and upload preferences.
- Updated settings persistence to include FaceUploadPath and SSH preferences.
- Added tests for FaceUploadPath validation and upload command enabling logic.

CatalogLite/AsyncCommand.cs

@@ -1,3 +1,4 @@
+using Avalonia.Threading;
 using System.Windows.Input;
 
 namespace CatalogLite;
@@ -38,5 +39,14 @@ public sealed class AsyncCommand : ICommand
         }
     }
 
-    public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+    public void RaiseCanExecuteChanged()
+    {
+        if (Dispatcher.UIThread.CheckAccess())
+        {
+            CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+            return;
+        }
+
+        Dispatcher.UIThread.Post(() => CanExecuteChanged?.Invoke(this, EventArgs.Empty));
+    }
 }