Enhance code style:
- Standardize import organization across all Python files following PEP 8
- Add comprehensive Google-style docstrings to all public functions and classes
- Enhance type hints throughout the codebase for better IDE support
- Improve error handling with descriptive messages and proper exception types
- Enhance setup.py with better metadata and comprehensive classifiers
- Improve utility functions with proper documentation and decorators
- Add proper code formatting and style consistency
- Update version to 1.6.1