add: auto release with sha

[Tieqiong]

@sbillinge please check, thanks

This will automatically GitHub release after a tag being pushed by maintainer or admin with the tag message + correct sha256 in the release message

[sbillinge]

This is nice. We are using centralized workflows now, in scikit-package/release scripts. To reduce maintenance in the future, please could you look into incorportating this as much as possible into a more centralized worklow that we just call from here? You can loop in Bob with questions.

[Tieqiong]

@sbillinge Thanks for the suggestion. The point of a centralized workflow is to offer a reusable, consistent process—but our C++ library’s build and release steps are quite different from our Python packages, and we don’t yet have a skpkg standard for C++ modules. Folding this into the central repo today would either clutter it with C++-specific logic or introduce extra layers here, without real benefit.
Since we expect this library to be heavily modified and updated, with any possible future skpkg C++ standard to evolve rapidly, a temporary dedicated workflow in this repo is simpler and more maintainable for now. Once we’ve defined a skpkg C++ standard, we can migrate it back upstream.

[sbillinge]

sounds good. I agree.