feat: use simpler nitro instead of nestjs to implement mock service

apps/web-antd/src/views/demos/breadcrumb/level-detail.vue

@@ -0,0 +1,13 @@
+<script lang="ts" setup>
+import { Fallback } from '@vben/common-ui';
+
+defineOptions({ name: 'BreadcrumbLevelDetail' });
+</script>
+
+<template>
+  <Fallback
+    description="面包屑导航-层级模式-详情页"
+    status="coming-soon"
+    title="注意观察面包屑导航变化"
+  />
+</template>