just-bashit v0.2.0

Added

• PyPI packaging: scripts are now installable via pip install just-bashit or
  uv tool install just-bashit, exposing jb, jbx, and jb-inspect as
  console entry points.
• CHANGELOG.md tracking releases in keep-a-changelog format.
• Standardized release process: make setup, make bump-version,
  make release-branch, make tag-release Makefile targets.
• Tag-triggered release.yml with CI gate, PyPI publish, and GitHub release
  with CHANGELOG notes.