v0.1.2

Marketplace-ready release.

• Action renamed to mcplint-sec — Marketplace requires a unique name
  (mcplint is taken by an existing GitHub account). Usage is unchanged:
  reference the action as dtduc-git/mcplint@v0.1.2.
• Docs: M8ven Live Monitored badge, init command documented, corrected
  uvx install commands.

Install: uvx mcplint-sec scan · PyPI: https://pypi.org/project/mcplint-sec/