Initial project structure cleanup

src/main.tsx

@@ -0,0 +1,21 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+
+import App from './app/App';
+
+import './styles/globals.css';
+
+const rootElement =
+  document.getElementById('root');
+
+if (!rootElement) {
+  throw new Error(
+    'Root element not found',
+  );
+}
+
+ReactDOM.createRoot(rootElement).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);