feat: initial version

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

lib/Client/Mime/Part/Disposition.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Gricob\IMAP\Mime\Part;
+
+final readonly class Disposition
+{
+    public function __construct(
+        public string $type,
+        public ?string $filename,
+    ) {
+    }
+}