Summary

Adds a stone --version flag and exposes the package version programmatically as stone.__version__. Useful for bug reports and scripting.

$ stone --version
stone 3.5.1

Changes

• pyproject.toml — configures setuptools-scm to generate stone/_version.py from the release tag.
• stone/__init__.py — exposes the generated version, with a 0.0.0.dev0 fallback for an unbuilt source tree.
• stone/cli.py — adds a long-form --version argument; -v remains --verbose.
• Tests — verifies --version exits successfully and that a generated version is honored in a source checkout.

Testing

• Full test suite: 184 passed.
• flake8: clean.
• pylint: 10.00/10.
• Wheel build includes the generated version module and reports the derived package version.