Migrated from Black and isort to Ruff for code formatting and linting, a modern, blazingly fast formatter and linter written in Rust.

Enabled additional ruff rule sets.

For end users:

No changes required. This is purely a development tooling change that doesn't affect the library API or behavior.

For contributors:

• Use make reformat or uv run ruff format to format code (replaces black and isort)
• Use make lint to check code quality (now includes formatting, linting, and type checking)
• Pre-commit hooks automatically updated to use ruff and ruff-format
• CI/CD pipelines updated to use ruff in GitHub Actions workflows

Benefits:

• 10-100x faster formatting and linting compared to Black + isort + flake8
• Single tool for formatting, import sorting, and linting
• More comprehensive code quality checks out of the box
• Auto-fixes for many common issues (33 issues auto-fixed during migration)
• Better integration with modern Python development workflows

This change improves the developer experience and code quality while maintaining the same code style standards.