Fixes #4.
- Moves both plugin skills to documented skills//SKILL.md layout.
- Removes the Claude Code skills: ./ manifest override rejected on Windows.
- Bumps jetpack-compose-audit to 2.1.1 and compose-agent to 1.2.1.
- Adds bin/ci checks for plugin validation, README links, JSON manifests, layout, and version consistency.
Validation: ./bin/ci passes locally with claude plugin validate for both plugins.