move react projects to own folder

react/scelta-carriera/src/main.jsx

@@ -0,0 +1,13 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.jsx'
+
+const rootElement = document.getElementById('root')
+if (!rootElement) throw new Error('Root element not found')
+
+createRoot(rootElement).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)