Add initial set of files

src/Controller/HomeController.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Annotation\Route;
+
+final class HomeController extends AbstractController
+{
+    #[Route(path: '/', name: 'home')]
+    public function __invoke(): Response
+    {
+        // TODO: show a list of all components.
+        return $this->render('home.html.twig');
+    }
+}