Create actual releases that are checking if there are build errors

[TimPietrusky]

Is your feature request related to a problem? Please describe.
Currently, we only use git tags for a new release, but we need to do proper releases, that also run the build script, so we can be sure, that there are no build errors.

[pixelass]

we still use tags right now but I added two workflows that build the app on windows and ubuntu.

Keeping this open until we have a better automatic release mechanism