Restructure project to root layout

src/main.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import { App } from './App';
+
+const root = document.getElementById('root');
+
+if (!root) {
+  throw new Error('Root element not found');
+}
+
+ReactDOM.createRoot(root).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);