[feat: backend] Create haves api endpoints

[therealjustinbiele]

Description

As a developer, I need to create RESTful API endpoints in the backend to handle CRUD (Create, Read, Update, Delete) operations for the "Have" data model, enabling users to manage the items they possess within the application.

Technical Requirements

• Define Express routes for handling CRUD operations on "Have" data model.
• Implement route for creating a new "have" item (POST /api/haves).
• Implement route for retrieving all "have" items (GET /api/haves).
• Implement route for retrieving a specific "have" item by ID (GET /api/haves/:id).
• Implement route for updating an existing "have" item (PUT /api/haves/:id).
• Implement route for deleting a "have" item by ID (DELETE /api/haves/:id).
• Ensure appropriate validation and error handling for each endpoint.
• Integrate endpoints with data access layer to perform CRUD operations on the "Have" data model.
• Test endpoints thoroughly using tools like Postman to verify functionality and reliability.
• Document API endpoints including request/response structures, error handling, and usage examples.
• Ensure adherence to RESTful principles and best practices in API design.
• Coordinate with frontend team to ensure compatibility and smooth integration of backend endpoints with frontend components.

[therealjustinbiele]

5-8 story points