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>

.agents/skills/bmad-agent-tech-writer/validate-doc.md

@@ -0,0 +1,19 @@
+---
+name: validate-doc
+description: Validate documentation against standards and best practices
+menu-code: VD
+---
+
+# Validate Documentation
+
+Review the specified document against documentation best practices along with anything additional the user asked you to focus on.
+
+## Process
+
+1. **Load the document** — Read the specified document fully
+2. **Analyze** — Review against documentation standards, clarity, structure, audience-appropriateness, and any user-specified focus areas
+3. **Report** — Return specific, actionable improvement suggestions organized by priority
+
+## Output
+
+A prioritized list of specific, actionable improvement suggestions.