refactor: use custom imap client

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

lib/Client/IdentifierMode.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXM\ProviderImap\Client;
+
+enum IdentifierMode
+{
+    case Sequence;
+    case Uid;
+
+    public function toCommand(): string
+    {
+        return $this === self::Uid ? 'UID FETCH' : 'FETCH';
+    }
+}