Chore: Bump version to v1.1.0 and implement automated release system

app/Middleware/AuthMiddleware.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Middleware;
+
+class AuthMiddleware implements MiddlewareInterface {
+    public function handle($request, \Closure $next) {
+        // Assume session is started in index.php
+        if (!isset($_SESSION['user_id'])) {
+            header('Location: /login');
+            exit;
+        }
+
+        return $next($request);
+    }
+}