refactor(modules): extract castopod parts into a modules/ folder for a scalable HMVC structure

- create Admin, Analytics, Auth, Fediverse and Install modules in the root modules/ folder
- rename
ActivityPub to Fediverse

modules/Admin/Controllers/FediverseController.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace Modules\Admin\Controllers;
+
+class FediverseController extends BaseController
+{
+    public function dashboard(): string
+    {
+        return view('Modules\Admin\Views\fediverse\dashboard');
+    }
+
+    public function blockedActors(): string
+    {
+        helper(['form']);
+
+        $blockedActors = model('ActorModel')
+            ->getBlockedActors();
+
+        return view('Modules\Admin\Views\fediverse\blocked_actors', [
+            'blockedActors' => $blockedActors,
+        ]);
+    }
+
+    public function blockedDomains(): string
+    {
+        helper(['form']);
+
+        $blockedDomains = model('BlockedDomainModel')
+            ->getBlockedDomains();
+
+        return view('Modules\Admin\Views\fediverse\blocked_domains', [
+            'blockedDomains' => $blockedDomains,
+        ]);
+    }
+}