refactor: organize desktop vs. mobile into separate folders

js/desktop/src/renderer.tsx

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