feat: Ajout de React pour le front, début de refonte du front

assets/react/app/index.jsx

@@ -0,0 +1,11 @@
+import React from 'react'
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import App from './App.jsx'
+import '../../styles/app.scss'
+
+createRoot(document.getElementById('react-app')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)