prepmd CI

Add GitHub Actions workflow to notify Zulip on release #135

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Run tests (macos-15, 3.13)	51m 49s
Run tests (ubuntu-24.04, 3.13)	2h 10m 31s
Finalise Coveralls	5s
	3h 2m 25s