[Fix] Filter products by category in Get all Product endpoint

[Odili1]

Description

Make a change to the get all products endpoint. The endpoint should also be able to search for products by categories. The endpoint will optionally accept a category as a query param, validate if it is a valid product category and gets the list of product under that category. The client will receive a 200 upon a successful fetch and a 404 if no products under the category is found. In addition, tests should be included to improve quality, maintainability and to ensure the endpoint work as expected.

Acceptance Criteria

• Accepts and validate category as query param if added
• Return appropriate response and status code

Requirements

• Method: GET
• URL: /api/v1/organisations/{orgId:guid}/products?category={string}
• Headers: application/json

Response:

Successful Response

    {
        "message": "string",
        "success": true,
        "status_code": int,
        "data": []
    }

Error Response

    {
        "message": "string",
        "success": false,
        "status_code": int
    }

Response Codes:

• 200 Created: When products are found.
• 404 Not Found: If no product exist.
• 500 Internal Server Error: For unexpected errors.

Unit Tests

• If the category query param is provided, ensure it is a valid category
• To ensure that the appropriate response format and status code is returned