Restaurant Order API

Build a Fastify API for a restaurant ordering system. The API should handle creating, listing, and retrieving orders.

An order has: id (UUID string), customerName (string), items (array of order items), status (string: "pending", "preparing", "ready", "delivered"), totalPrice (number), and createdAt (ISO date string). Each order item has: menuItemId (integer), name (string), size ("small", "medium", "large"), quantity (integer, 1-20), and price (number).

Endpoints

• POST /api/orders -- Create a new order. Accepts customerName and items in the body.
• GET /api/orders -- List all orders. Accepts optional status query parameter to filter.
• GET /api/orders/:id -- Get a single order by ID.
• PATCH /api/orders/:id/status -- Update order status. Accepts status in the body.

Use an in-memory array for storage (no database needed).

Output

Produce TypeScript files in a src/ directory:

• src/app.ts -- Fastify app setup and configuration
• src/plugins/orders.ts -- Order routes and handlers
• src/services/orderService.ts -- Business logic for order management
• src/server.ts -- Server startup

Do not include test files or build configuration.