refactor: organize desktop vs. mobile into separate folders

js/desktop/src/huddle_window/renderer.tsx

@@ -0,0 +1,9 @@
+import { createRoot } from 'react-dom/client';
+import { HuddleApp } from './HuddleApp';
+import { initSentryRenderer } from '@/lib/sentry';
+import '@/styles/globals.css';
+
+initSentryRenderer();
+
+const root = createRoot(document.getElementById('root')!);
+root.render(<HuddleApp />);