Added Global KeyUp Event which is passed to ViewModel

Views/MainWindow.axaml.cs

@@ -19,6 +19,16 @@ public partial class MainWindow : Window
         DataContext = new MainWindowViewModel();
         Topmost = true;
         Topmost = false;
+
+        this.KeyUp += OnKeyUp;
+    }
+
+    private void OnKeyUp(object? sender, KeyEventArgs e)
+    {
+        if (DataContext is MainWindowViewModel vm)
+        {
+            vm.GlobalKeyUpHandler(e);
+        }
     }
 
     // MVVM like implementations burst the bounds -> implemented the old school way