feat: Initialize VitePress configuration and add Node.js types dependency.

.vitepress/config.mts

@@ -1,4 +1,6 @@
 import { defineConfig } from 'vitepress'
+import { createWriteStream } from 'fs'
+import { resolve } from 'path'
 import { sidebarEn, sidebarId } from './config/sidebars'
 import { navEn, navId } from './config/nav'
 
@@ -11,6 +13,13 @@ export default defineConfig({
   sitemap: {
     hostname: 'https://mivodev.github.io'
   },
+  buildEnd: ({ outDir }) => {
+    const sitemap = createWriteStream(resolve(outDir, 'robots.txt'))
+    sitemap.write('User-agent: *\n')
+    sitemap.write('Allow: /\n')
+    sitemap.write('Sitemap: https://mivodev.github.io/sitemap.xml\n')
+    sitemap.end()
+  },
   
   head: [
     ['link', { rel: 'icon', href: '/logo-m.svg' }],