feat: Full petmaster CRM with NestJS API and React frontend

- Client management (CRUD with JSONB custom fields)
- Pet profiles
- Service catalog with per-client pricing
- Booking calendar with recurring appointments
- Invoicing with Stripe integration
- Real-time messaging (WebSocket)
- Self-booking portal
- Staff assignment
- Docker multi-stage builds
- Prisma schema + seed

api/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "petmaster-api",
+  "version": "0.1.0",
+  "description": "Petmaster CRM backend API",
+  "scripts": {
+    "build": "nest build",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint 'src/**/*.ts' --fix"
+  },
+  "dependencies": {
+    "@nestjs/common": "^10.4.0",
+    "@nestjs/core": "^10.4.0",
+    "@nestjs/platform-express": "^10.4.0",
+    "@nestjs/platform-ws": "^10.4.0",
+    "@nestjs/websockets": "^10.4.0",
+    "@nestjs/jwt": "^10.2.0",
+    "@nestjs/passport": "^10.0.0",
+    "@nestjs/swagger": "^7.4.0",
+    "@prisma/client": "^6.0.0",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
+    "passport": "^0.7.0",
+    "passport-jwt": "^4.0.1",
+    "reflect-metadata": "^0.2.2",
+    "rxjs": "^7.8.1",
+    "stripe": "^17.0.0",
+    "ws": "^8.18.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^10.4.0",
+    "@nestjs/schematics": "^10.1.0",
+    "@types/express": "^5.0.0",
+    "@types/node": "^22.0.0",
+    "@types/passport-jwt": "^4.0.1",
+    "@types/ws": "^8.5.10",
+    "prisma": "^6.0.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.6.0"
+  }
+}