feat(api): add bookings CRUD and payment endpoints

- Add bookings list/create API with filters (siteId, date, status)
- Add booking detail, update, and delete endpoints
- Add payment processing endpoint with transaction support
- Add clients list/search and create API
- Implement membership discounts (free hours and percentage)
- Validate requests with Zod schemas from shared package
- Include Spanish error messages

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/package.json

@@ -13,6 +13,7 @@
     "db:studio": "prisma studio"
   },
   "dependencies": {
+    "@padel-pro/shared": "*",
     "@prisma/client": "^5.10.0",
     "@radix-ui/react-dialog": "^1.0.5",
     "@radix-ui/react-dropdown-menu": "^2.0.6",
@@ -29,7 +30,8 @@
     "next-auth": "^4.24.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "tailwind-merge": "^2.2.0"
+    "tailwind-merge": "^2.2.0",
+    "zod": "^3.22.4"
   },
   "devDependencies": {
     "@types/bcryptjs": "^2.4.6",