Implement `GET /requests` Endpoint for Retrieving the wishbox requests.

[Lapotor]

Description:

This work item involves implementing the GET /requests endpoint in the RadioRoster API. This endpoint is responsible for retrieving the wishbox requests.

Tasks:

• Create the route and controller action for handling GET requests to /requests.
• Implement the logic to retrieve wishbox requests from the database.
• Serialize the retrieved data into the appropriate response format (JSON).
• Add appropriate error handling and response codes for various scenarios (e.g., successful retrieval, no requests found, server error).
• Test the endpoint using appropriate testing frameworks to ensure it functions as expected.
• Document any specific considerations or details related to this endpoint.

Acceptance Criteria:

• When a GET request is made to /requests, the API should respond with a JSON array containing wishbox requests.
• If there are no requests, the API should return an empty array.
• The endpoint should handle errors gracefully and return appropriate status codes and error messages.