Add new optional beta email parser thats based on ImapEngine instead of Webklex

plugins/vendor/directorytree/imapengine/src/Enums/ImapFlag.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace DirectoryTree\ImapEngine\Enums;
+
+enum ImapFlag: string
+{
+    case Seen = '\Seen';
+    case Draft = '\Draft';
+    case Recent = '\Recent';
+    case Flagged = '\Flagged';
+    case Deleted = '\Deleted';
+    case Answered = '\Answered';
+}