Update conftest.py

[likhon-forbidden]

Added Documentation for Fixtures: Added docstrings to fixtures for better documentation.

Added Mocked configure_interpreter Fixture: Created a fixture mock_configure_interpreter to mock the configure_interpreter function, making it easier to test server endpoints without invoking the actual interpreter setup.

Added Authenticated and Authorized Client Fixtures: Added fixtures (authenticated_client and authorized_client) to provide TestClient instances with authentication and authorization setup, respectively.

Added Invalid Client Fixture: Added a fixture (invalid_client) to provide a TestClient instance without proper authentication/authorization, useful for testing unauthorized access scenarios.

Added Test Data Fixture: Added a fixture (test_data) to provide common test data, promoting DRY (Don't Repeat Yourself) principles in tests.

Added Mocked Request Fixture: Added a fixture (mock_request) to mock the requests.get function, facilitating testing of code that relies on external HTTP requests.

[tyfiero]

Thanks @likhon-forbidden. I don't see in the code you added how the features you mentioned were implemented, can you explain the benefits of your approach to the conftest.py?