feat: speed improvements

Signed-off-by: Sebastian Krupinski <root@LAPTOP-7DVOR6NC>

lib/Client/Protocol/Command/Argument/Search/Subject.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Gricob\IMAP\Protocol\Command\Argument\Search;
+
+final readonly class Subject implements Criteria
+{
+    public function __construct(private string $value) {}
+
+    public function __toString(): string
+    {
+        return 'SUBJECT "' . str_replace(['"', '\\'], ['\\"', '\\\\'], $this->value) . '"';
+    }
+}