v0.1.2

vibe-cading 0.1.2 — docs & release-tooling

A documentation / release-tooling release — no library code change since 0.1.1.
Its user-facing value is the refreshed README on the PyPI project page.

Changed:
- README: PyPI install instructions (`pip install vibe_cading` /
  `vibe_cading[mcp]`) and a headless-Linux `libgl1` / OpenGL caveat for
  CadQuery's geometry kernel; "AI agents" terminology.
- Release pipeline: PyPI publish is now gated by a per-release required-reviewer
  approval on the `pypi` GitHub Environment (replacing the `PYPI_PUBLISH` repo
  variable).

See CHANGELOG.md for details.