feat: Add slug field

Author: 64knl

src/NotFound/Layout/Inputs/LayoutInputSlug.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace NotFound\Layout\Inputs;
+
+class LayoutInputSlug extends AbstractInput
+{
+    protected string $type = 'InputSlug';
+
+    protected string $value = '';
+}