Replace @arcade/backend (NestJS) with @arcade/server (Hono/Bun).
Same two endpoints, no auth required (public game generator):
- POST /api/games/generate — AI game generation (Gemini, Claude, GPT)
- POST /api/games/submit — Community game submission via GitHub PR
- GET /health — Health check
This removes the last remaining NestJS backend from the monorepo.
NestJS is now completely gone — all servers use Hono + Bun.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
