v1.5.0

Added

• Add skills/docusaurus-docs-site/SKILL.md checklist for building a Docusaurus
  docs site on documentation-actions (repo setup, Node, reusable-docs-ci @v1,
  deploy, lint, link check, changelog, auto-rebase, i18n, AGENTS.md, PR template).

Fixed

• Quote the root action.yml description so yamllint accepts the colon in
  "awesome-lists: lint" (CI Lint was red on main after the Marketplace shorten).
• Quote the root action.yml description so yamllint accepts the colon in the summary.
• Make reusable-docusaurus-test-deploy.yml a thin compatibility wrapper around
  reusable-docs-ci so legacy callers keep resolving after the docs-ci umbrella
  move. New sites should call reusable-docs-ci.yml directly.