添加导航栏入口和同级分类

为笔记添加导航栏入口

• 更新导航栏配置,修改 docs/.vuepress/navbar.ts 文件

• 修改后的导航栏配置如下：

  docs/.vuepress/navbar.ts

  export default defineNavbarConfig([
    { text: '首页', link: '/' },
    { text: '博客', link: '/blog/' },
    { text: '标签', link: '/blog/tags/' },
    { text: '归档', link: '/blog/archives/' },
    {
      text: '笔记',
      items: [
        { text: '示例', link: '/demo/' },
        { text: '博客搭建指北', link: '/construct_blog/' }
      ]
    },
  ])