Add TuxiNet branding and document templates

app/Core/Controller.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Core;
+
+class Controller
+{
+    protected function view(string $template, array $data = []): Response
+    {
+        $content = View::render($template, $data);
+        return new Response($content);
+    }
+
+    protected function redirect(string $url): Response
+    {
+        return new Response('', 302, ['Location' => $url]);
+    }
+}