ci: add workflow for automated GitHub release

ci: add workflow for automated GitHub release

Implement a GitHub Actions workflow for automated project releases.

The workflow triggers on Git tags, ensuring that a GitHub release is
created whenever a new tag is pushed.

That new release is going to be created in draft and pre-release mode
and needs to be manually promoted to the proper release, once its
decided, that its good enough and prepared.

This is a start of a streamlined and consistent release process for
GitHub, reducing manual intervention.

Acked-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>