Move plugin files to a subfolder

[MAILPOET-3988]

mailpoet/lib/Settings/UserFlagsRepository.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace MailPoet\Settings;
+
+use MailPoet\Doctrine\Repository;
+use MailPoet\Entities\UserFlagEntity;
+
+/**
+ * @extends Repository<UserFlagEntity>
+ */
+class UserFlagsRepository extends Repository {
+  protected function getEntityClassName() {
+    return UserFlagEntity::class;
+  }
+}