feat: turbostarter boilerplate

Production-ready Next.js boilerplate with:
- Runtime env validation (fail-fast on missing vars)
- Feature-gated config (S3, Stripe, email, OAuth)
- Docker + Coolify deployment pipeline
- PostgreSQL + pgvector, MinIO S3, Better Auth
- TypeScript strict mode (no ignoreBuildErrors)
- i18n (en/es), AI modules, billing, monitoring

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/i18n/src/translations/en/index.ts

@@ -0,0 +1,11 @@
+export const en = {
+  common: () => import("./common.json"),
+  auth: () => import("./auth.json"),
+  billing: () => import("./billing.json"),
+  marketing: () => import("./marketing.json"),
+  organization: () => import("./organization.json"),
+  admin: () => import("./admin.json"),
+  dashboard: () => import("./dashboard.json"),
+  validation: () => import("./validation.json"),
+  ai: () => import("./ai.json"),
+} as const;