Hoshi42

Update Phonox project docs and cut a release commit. Use when: finishing a feature or fix in phonox; user says 'update docs', 'update changelog', 'commit and push'; after code changes need CHANGELOG, README, or docs updated before pushing. Handles CHANGELOG.md, backend/README.md, docs/ user-guide and API docs, then stages all changed files, commits with a conventional-commit message, and pushes to remote.