Automatical builds for non-windows platform

[MRigal]

To ease further use, it would be great if, ideally through github actions, there would be executable builds available for other platforms (Mac OS [both Intel and ARM]), and Linux generic.

[MRigal]

Here is a github action which just installs QT on the required platform.

You could create a github action to build the binaries based on this action: https://github.com/jurplel/install-qt-action
Here a medium article showing the whole process. Your workflow is a bit easier than this, so you could handle it similarly. In a first step, Windows-only, similarly to your actual process.

Then you could build it for other platforms by using a Build Matrix, like this (way too complicated) example: https://cristianadam.eu/20191222/using-github-actions-with-c-plus-plus-and-cmake/