chore: initial monorepo scaffold + WDS Phase 1+2 artifacts

- Nx 22.7 monorepo (pnpm 11.1, TypeScript 5.9, Node 24)
- apps/api: NestJS 11 (CJS conforme CODING-RULES.md PGD-DB-004)
- apps/web: React 19 + Vite 8 (ESM)
- libs/shared/api-interface: Zod contract base
- Docker Compose dev: Postgres 18, Valkey 8, MinIO, Mailpit
- WDS artifacts:
  - design-artifacts/A-Product-Brief/ (5 docs canônicos + 16 dialogs)
  - design-artifacts/B-Trigger-Map/ (hub + 4 personas + feature impact)
- Stack canon: STACK.md v2.2 + CODING-RULES.md v2.0 + brand.md
- AGENTS.md + README.md como entrada para devs/agentes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pnpm-workspace.yaml

@@ -0,0 +1,18 @@
+packages:
+  - 'apps/*'
+  - 'libs/*/*'
+  - 'libs/*/*/*'
+
+allowBuilds:
+  '@nestjs/core': true
+  '@parcel/watcher': true
+  '@swc/core': true
+  less: true
+  nx: true
+  unrs-resolver: true
+
+catalog:
+  # Stack canon JCS v2.2 — fonte da verdade: STACK.md
+  zod: ^4.0.0
+  typescript: ^5.9.3
+  '@types/node': ^24.12.4