Proposal: notarized macOS releases and Homebrew distribution

[0thomasholland]

This issue tracks a two-stage macOS distribution plan.

Long-term: signed and notarized release artifacts

PR #1436 adds the environment wiring needed for Tauri to sign and notarize published macOS release builds once maintainers configure Apple Developer credentials as repository secrets. This would make the release artifacts Gatekeeper-compliant and eligible for the official Homebrew Cask repository.

Interim: upstream-maintained Homebrew tap

PR #1437 adds a versioned Cask scaffold and instructions for a maintainer-owned CyberTimon/homebrew-rapidraw tap. This would offer brew install --cask rapidraw before notarization is available. Users may still receive Gatekeeper warnings until signed releases ship.

Requested maintainer decisions

1. Is signing and notarization acceptable for future macOS releases?
2. Is CyberTimon/homebrew-rapidraw an acceptable interim distribution channel?
3. If so, which maintainer should own the Apple Developer credentials and release-tap automation?