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>

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["ms-playwright.playwright", "esbenp.prettier-vscode"]
+}

.vscode/launch.json

@@ -0,0 +1,20 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Debug api with Nx",
+      "runtimeExecutable": "pnpm",
+      "runtimeArgs": ["exec", "nx", "serve", "api"],
+      "env": {
+        "NODE_OPTIONS": "--inspect=9229"
+      },
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "skipFiles": ["<node_internals>/**"],
+      "sourceMaps": true,
+      "outFiles": ["${workspaceFolder}/apps/api/dist/**/*.(m|c|)js", "!**/node_modules/**"]
+    }
+  ]
+}