fix WPF Application ambiguity with WinForms

Made-with: Cursor

Author: youssof20

src/PassTheStick.Host/App.xaml.cs

@@ -2,7 +2,7 @@
 
 namespace PassTheStick.Host;
 
-public partial class App : Application
+public partial class App : System.Windows.Application
 {
     private void App_OnStartup(object sender, StartupEventArgs e)
     {