Add Next.js + Lingo.dev i18n starter

[Rarebuffalo]

Community Submission: Next.js + Lingo.dev i18n Starter

This PR adds a new community project under:

community/nextjs-lingo-i18n-starter

What this project demonstrates

• Next.js App Router language routing using dynamic segment: src/app/[lang]
• Working routes for:
  • /en
  • /hi
  • /es
• A Language Switcher to change locale via routing
• JSON dictionary based translation structure:
  • src/locales/en.json
  • src/locales/hi.json
  • src/locales/es.json
• Lingo.dev CLI integration using i18n.json for automatic translations:
  • en → hi
  • en → es

---

🚀 How to run locally

cd community/nextjs-lingo-i18n-starter
npm install
npm run dev

[sumitsaurabh927]

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[Rarebuffalo]

Added the required changeset and pushed the update

[Rarebuffalo]

Added required changeset and pushed update.
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