Bootstrap monorepo: Hono API, React PWA, Drizzle DB, CI/CD

Sets up the initial project structure for groombook/groombook:

- pnpm monorepo with apps/api (Hono + TypeScript), apps/web (React + Vite + PWA), packages/db (Drizzle ORM), packages/types (shared types)
- Core DB schema: clients, pets, services, appointments, staff with CNPG-compatible Postgres
- REST API routes for clients, pets, services, appointments with Zod validation
- OIDC auth middleware for Authentik integration
- React PWA with vite-plugin-pwa, service worker, offline caching, installable manifest
- GitHub Actions CI: lint, typecheck, test, build, Docker image build (groombook-runners)
- Dockerfiles for API (Node.js) and Web (nginx)
- docker-compose.yml for local development

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package.json

@@ -0,0 +1,19 @@
+{
+  "name": "groombook",
+  "private": true,
+  "version": "0.0.1",
+  "description": "Open source, self-hostable pet grooming business management platform",
+  "scripts": {
+    "dev": "pnpm --parallel -r dev",
+    "build": "pnpm -r build",
+    "lint": "pnpm -r lint",
+    "typecheck": "pnpm -r typecheck",
+    "test": "pnpm -r test",
+    "db:migrate": "pnpm --filter @groombook/db migrate"
+  },
+  "engines": {
+    "node": ">=20",
+    "pnpm": ">=9"
+  },
+  "packageManager": "pnpm@9.15.4"
+}