feat: 添加首页公告栏

docs/.vitepress/theme/index.ts

@@ -4,6 +4,7 @@ import type { Theme } from 'vitepress'
 import DefaultTheme from 'vitepress/theme'
 import './style.css'
 import './custom.css'
+import Announcement from './components/Announcement.vue'
 import ArticleInfo from './components/ArticleInfo.vue'
 import {
   NolebaseGitChangelogPlugin
@@ -24,6 +25,9 @@ export default {
   Layout: () => {
     return h(DefaultTheme.Layout, null, {
       // https://vitepress.dev/guide/extending-default-theme#layout-slots
+      // 首页公告栏
+      'home-hero-info-before': () => h(Announcement),
+      // 文档前内容
       'doc-before': () => h(ArticleInfo),
       // [配置] 阅读增强
       // 为较宽的屏幕的导航栏添加阅读增强菜单