feat: add download components

.vitepress/theme/index.js

@@ -2,6 +2,7 @@
 import { h, watch } from 'vue'
 // import Theme from 'vitepress/theme'
 import DefaultTheme from 'vitepress/theme-without-fonts'
+import Download from '../../components/Download.vue'
 import './style.css'
 import './rainbow.css'
 
@@ -16,6 +17,7 @@ export default {
   },
   enhanceApp(ctx) {
     DefaultTheme.enhanceApp(ctx)
+    ctx.app.component('Download', Download)
     if (typeof window === 'undefined')
       return