feat(website): Add llms.txt support

Author: yamadashy

website/client/.vitepress/config/configShard.ts

@@ -7,6 +7,7 @@ import { configJaSearch } from './configJa';
 import { configKoSearch } from './configKo';
 import { configPtBrSearch } from './configPtBr';
 import { configZhCnSearch } from './configZhCn';
+import llmstxt from 'vitepress-plugin-llms'
 
 const googleAnalyticsTag = 'G-7PTT4PLC69';
 
@@ -43,6 +44,10 @@ export const configShard = defineConfig({
 
   srcDir: 'src',
 
+  vite: {
+    plugins: [llmstxt()]
+  },
+
   rewrites: {
     // rewrite to `en` locale
     'en/:rest*': ':rest*',