Refactor TestUserRoutes Status Codes and Refactor API Response Structures into Separate Module

[doziestar]

This PR addresses the need to make our codebase more maintainable by extracting response structures from the routes.py and placing them in a new, dedicated responses.py file and also addresses the issue of hardcoded status codes in the TestUserRoutes class. This change not only enhances readability but also ensures that we're leveraging FastAPI's built-in utilities for more maintainable and self-explanatory code.

Key Changes:

1. Introduced responses.py to house centralized response structures.
2. Updated endpoints in routes.py to utilize the response structures from the new module.
3. Enhanced overall readability of the routes.py by reducing inline content.

[asacristani]

Great work!
With this structure, the services are more clear reducing the code in router.
Please, can you run the pre-commit hooks? It is not passing the pipeline (if not, I will run it later).

Thanks!

[doziestar]

resolved

[asacristani]

Good job @doziestar
Thanks!