[PLUGIN][ActivityPub][Inbox] Accept Follow Activity

Improve how Core Activity is handled in general

components/Subscription/Subscription.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Component\Subscription;
+
+use App\Core\Modules\Component;
+
+class Subscription extends Component
+{
+}