feat: refactor sidebar management and routing metadata

src/pages/Home.page.vue

@@ -2,7 +2,7 @@
 definePage({
   meta: {
     title: '首页',
-    hidden: false,
+    hideInMenu: false,
   },
 });
 </script>

src/pages/demos/index.page.vue

@@ -1,4 +1,4 @@
 <script setup lang="ts">
-definePage({ meta: { title: '示例演示' } });
+definePage({ meta: { title: '示例演示', link: false } });
 </script>
 <template><div>此页面文件仅用于在侧边栏菜单中显示示例演示分组标题</div></template>