Cut 0.3.0 for the codexqa-* names, architecture wiki, and landing REA…

…DME.

Move Unreleased into this tag, keep the Star CTA plus stargazers list, and clone the repo before the zero-model install check.

Co-authored-by: Cursor <cursoragent@cursor.com>

Ship five vendor-neutral skills and searchable project metadata.

Improve quickstart and repository metadata

Improve documentation and community readiness

feat: add initial verification skills