add base template + mainController

src/Controller/MainController.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+class MainController extends AbstractController
+{
+    #[Route('/', name: 'home')]
+    public function index(): Response
+    {
+        return $this->render('main/index.html.twig');
+    }
+}