* ci.yml: on pull requests to main, runs on windows-latest and macos-latest;
checks formatting, runs clippy (warnings denied), and runs the unit tests
(`cargo test --workspace`).
* release.yml: manual workflow_dispatch (tag + optional prerelease inputs);
builds release binaries for Windows (x86_64) and macOS (aarch64 + x86_64),
then publishes them to GitHub Releases with auto-generated notes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
