Document v0.17.0 distribution and sponsorship

[raiseCatError]

Changes

Document v0.17.0 as the published stable release and Homebrew as the recommended macOS installation method. Remove the obsolete release-candidate and Homebrew-preparation warnings while retaining source installation, update/uninstall guidance, the reel hero and future Context Pack scope.

Correct the same stale public state in the roadmap, contributor/agent guidance, Context Modules guide, changelog and llms.txt. Set GitHub Sponsors metadata to github: [raiseCatError]; this supplies GitHub’s Sponsor button metadata on master.

The existing v0.17.0 release’s installation text now documents the public Homebrew command and source alternative. Its tag, target commit, title and publication state are unchanged.

Validation

• npm run verify: build and full canonical suite passed.
• Focused docs asset and authored Markdown tests: 16 passed.
• 75 local links and heading anchors checked; funding YAML parsed and matched the requested GitHub-only configuration.
• git diff --check passed.
• Package remains 0.17.0; no runtime, test, version or tap changes. Homebrew publishing retains if: ${{ false }}.

No terminal behavior changes or additional physical testing are required for this documentation update.