refactor: use custom imap client

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

lib/Client/ConnectionSecurity.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXM\ProviderImap\Client;
+
+enum ConnectionSecurity: string
+{
+    case Plain = 'plain';
+    case Tls = 'tls';
+    case StartTls = 'starttls';
+
+    public function transport(): string
+    {
+        return $this === self::Tls ? 'ssl' : 'tcp';
+    }
+}