Add a job to build Zed images from current main

The job triggers on every commit to `main` or every PR with
`run-build-dmg` label and produces an install-ready *.dmg artifact attached to the
corresponding CI run.
4f36ba3b1eKirill Bulatov committed on 5/14/2023, 7:06:33 PMparentdb87e83
1 file changedLine totals unavailable