Set up CI/CD pipeline for automated testing

Implement a continuous integration and continuous deployment pipeline for the project:

## CI Tasks:
1. Set up GitHub Actions workflow to:
- Run tests on all pull requests
- Verify code formatting matches project style
- Run test coverage reporting
- Check docstring completeness
- Build documentation site

2. Automated testing on multiple Python versions:
- Python 3.8
- Python 3.9
- Python 3.10
- Python 3.11

3. Create test execution performance benchmarking

## CD Tasks:
1. Automated documentation generation and publishing
2. Package building and publishing to PyPI
3. Release note generation from commits

## Benefits:
- Ensures code quality through automated validation
- Prevents regressions when new code is added
- Standardizes code and documentation style
- Simplifies package deployment process

This infrastructure will improve the maintainability and quality of the codebase.