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>

.github/workflows/tests.yml

@@ -0,0 +1,47 @@
+name: CI / Tests
+
+on:
+  pull_request:
+    branches: ["*"]
+  push:
+    branches: ["main"]
+  merge_group:
+  workflow_dispatch:
+  workflow_call:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  FORCE_COLOR: "1"
+  NODE_VERSION: 22.x
+  # You can leverage Remote Caching with Turbo to speed up your builds
+  # @link https://turbo.build/repo/docs/guides/ci-vendors/github-actions
+  TURBO_TEAM: ${{ secrets.TURBO_TEAM }}
+  TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
+
+jobs:
+  test:
+    name: 🧪 Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: ✅ Checkout code
+        uses: actions/checkout@v5
+
+      - name: 🔨 Setup
+        uses: ./tooling/github/setup
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: 🖌️ Format
+        run: pnpm run format
+
+      - name: 🛻 Lint
+        run: pnpm run lint && pnpm run lint:ws
+
+      - name: 📝 Typecheck
+        run: pnpm run typecheck
+
+      - name: 🧪 Test
+        run: pnpm run test