Rewrite UserFlag entity to Doctrine

[MAILPOET-2014]

lib/Settings/UserFlagsRepository.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace MailPoet\Settings;
+
+use MailPoet\Doctrine\Entities\UserFlag;
+use MailPoet\Doctrine\Repository;
+
+/**
+ * @method UserFlag[] findBy(array $criteria, array $order_by = null, int $limit = null, int $offset = null)
+ * @method UserFlag|null findOneBy(array $criteria, array $order_by = null)
+ * @method UserFlag|null findOneById(mixed $id)
+ * @method void persist(UserFlag $entity)
+ * @method void remove(UserFlag $entity)
+ */
+class UserFlagsRepository extends Repository {
+  protected function getEntityClassName() {
+    return UserFlag::class;
+  }
+}