优化：优化 package.json 文件，去除无用配置（将 VitePress 版本升级为 v1.0.0-alpha.18）

docs/vite.config.ts

@@ -1,8 +1,11 @@
+import { defineConfig } from 'vite'
+//import { SearchPlugin } from 'vitepress-plugin-search'
 import Components from 'unplugin-vue-components/vite'
 import { ArcoResolver } from 'unplugin-vue-components/resolvers'
 
-export default {
+export default defineConfig({
   plugins: [
+    //SearchPlugin(),
     Components({
       dirs: ['.vitepress/theme/components'],
       include: [/\.vue$/, /\.vue\?vue/, /\.md$/],
@@ -10,4 +13,4 @@ export default {
     })
   ],
   ssr: { noExternal: ['@arco-design/web-vue'] }
-}
+})