feat: Add logging level to python bindings

[why-arong]

Changes

1. Added a new PyLevel enum to represent different logging levels (TRACE, DEBUG, INFO, WARNING, ERROR, CRITICAL). This allows users to specify the logging severity level when creating a new file logger.
2. Updated the Slogger.new_file_logger method to accept a level argument, enabling users to dynamically set the logging level from Python.
3. Registered the PyLevel class in the Python bindings, making it available for use within Python code.

[jopemachine]

Thanks!