i18n(pt): Import pt.ts and define as locale in `config/index.ts`

docs/.vitepress/config/index.ts

@@ -2,11 +2,13 @@ import { defineConfig } from 'vitepress'
 import { shared } from './shared'
 import { en } from './en'
 import { zh } from './zh'
+import { pt } from './pt'
 
 export default defineConfig({
   ...shared,
   locales: {
     root: { label: 'English', ...en },
-    zh: { label: '简体中文', ...zh }
+    zh: { label: '简体中文', ...zh },
+    pt: { label: 'Português', ...pt }
   }
 })