release: v0.2.0 (#13)

First release carrying the native cffi binding (sensorwatch.native, #11) and the
binary-wheel publish pipeline. Bumps the version in pyproject.toml and
sensorwatch/__init__.py and refreshes uv.lock.

Co-authored-by: Leonard Janke <lcjanke2020@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>