add redoc ui

Author: astral-data

src/OpenApi/Frankenphp/redoc/index.php

@@ -0,0 +1,5 @@
+<?php
+require_once dirname(__DIR__, 7) . '/vendor/autoload.php';
+?>
+<redoc spec-url="<?php echo \Astral\Serialize\OpenApi\Handler\Config::get('doc_url','http://127.0.0.1:8089'); ?>"></redoc>
+<script src="./redoc.standalone.js"> </script>