CONTRIBUTING.md

When writing code for inclusion in build123d please add docs and tests, ensure they build and pass, and ensure that pylint and mypy are happy with your code.

• Install pip following their documentation.
• Install development dependencies: pip install pylint pytest mypy sphinx
• Install docs dependencies: pip install -r docs/requirements.txt (might need to comment out the build123d line in that file)
• Install build123d in editable mode from current dir: pip install -e .
• Run tests with: python -m pytest
• Build docs with: cd docs && make html
• Check added files' style with: pylint <path/to/file.py>
• Check added files' type annotations with: mypy <path/to/file.py>