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>

.gitignore

@@ -0,0 +1,73 @@
+# Dependencies
+node_modules
+.pnpm-store
+.pnpm-debug.log*
+
+# Build outputs
+dist
+build
+out
+.nx
+.next
+.turbo
+.vite
+.cache
+coverage
+test-results
+playwright-report
+
+# Env & secrets
+.env
+.env.*
+!.env.example
+*.local
+.vault-token
+secrets
+
+# Editor & OS
+.DS_Store
+Thumbs.db
+.vscode/*
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/settings.json
+.idea
+*.swp
+*.swo
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Runtime
+*.pid
+*.seed
+*.pid.lock
+
+# Prisma
+*.db
+*.db-journal
+apps/api/prisma/migrations/dev/
+
+# Memory (Claude Code)
+memory/
+.claude/sessions/
+.claude/settings.local.json
+
+# OS-specific
+.AppleDouble
+.LSOverride
+desktop.ini
+
+# Generated docs
+TSDoc/
+typedoc-out/
+
+# Sentry CLI
+.sentryclirc
+
+vite.config.*.timestamp*
+vitest.config.*.timestamp*