feat: 메뉴 구성에 line 추가

hwe/sammo/DTO/MenuLine.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace sammo\DTO;
+
+use LDTO\DTO;
+
+class MenuLine extends DTO{
+  public readonly string $type;
+
+  public function __construct(
+  ){
+    $this->type = 'line';
+  }
+}