refactor: use custom imap client

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

lib/Client/ClientInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXM\ProviderImap\Client;
+
+use KTXM\ProviderImap\Client\Command\CommandInterface;
+
+interface ClientInterface
+{
+    public function connect(ConnectionConfig $config): void;
+
+    /**
+     * @return list<string>
+     */
+    public function capabilities(): array;
+
+    /**
+     * @template TResult
+     * @param CommandInterface<TResult> $command
+     * @return TResult
+     */
+    public function perform(CommandInterface $command): mixed;
+}