first standalone plugin commit

tests/test_app/src/Controller/AppController.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace TestApp\Controller;
+
+use Cake\Controller\Controller;
+
+class AppController extends Controller {
+    /**
+     * @return void
+     */
+    public function initialize(): void {
+        parent::initialize();
+
+        $this->loadComponent('Flash');
+    }
+}