refactor(auth): replace myth/auth with codeigniter/shield + define new roles

closes #222

modules/Auth/Controllers/InteractController.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Modules\Auth\Controllers;
+
+use CodeIgniter\Controller;
+use CodeIgniter\HTTP\RedirectResponse;
+
+/**
+ * Class ActionController
+ *
+ * A generic controller to handle Authentication Actions.
+ */
+class InteractController extends Controller
+{
+    public function attemptInteractAsActor(): RedirectResponse
+    {
+        $rules = [
+            'actor_id' => 'required|numeric',
+        ];
+
+        if (! $this->validate($rules)) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', service('validation')->getErrors());
+        }
+
+        helper('auth');
+
+        set_interact_as_actor((int) $this->request->getPost('actor_id'));
+
+        return redirect()->back();
+    }
+}