feat: Implement host shortcut system for desktop window management and input suppression

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_gui/lib/main.dart

@@ -29,6 +29,7 @@ void main() async {
   );
 }
 
+/// Whether desktop window-management APIs should be initialized for this host.
 bool get _supportsDesktopWindowing {
   if (kIsWeb) {
     return false;