chore: lots of changes

tests/Website/HomeControllerTest.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+test('HomeController gibt Hello World zurück', function () {
+    $controller = new \App\Website\HomeController();
+    ob_start();
+    $controller->show();
+    $output = ob_get_clean();
+
+    expect($output)->toBe('Hello World');
+});