zag releases

Public release channel for zag .

• Releases hold Zag-<version>.zip (the menubar app), zag-darwin-arm64 (the CLI), zag-bundle-darwin-arm64.tar.gz (the data bundle) and SHA256SUMS, all attested.
• The gh-pages branch serves the Sparkle appcast at https://kindlyops.github.io/zag-releases/appcast.xml.

zag pull downloads bundles from here without a token.