Latest Build

Fix release pipeline and site to point at correct repo

- workflow_dispatch now publishes/overwrites a 'latest' pre-release so
  manual action runs produce publicly downloadable binaries
- docs/index.html REPO constant corrected to jeebuscrossaint/estela
  (was pointing at upstream Zhongzhou repo which has no releases)
- Clean up duplicate/wrong GitHub links in nav and footer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

v0.1.0

Add GitHub Pages site and release workflow (#20, #21)

- docs/index.html: landing page with dynamic download links (fetches
  latest GitHub Release via API), usage instructions, supported
  question types
- build.yml: zip macOS .app on tag push, upload all platform binaries
  to GitHub Release via softprops/action-gh-release@v2