I'd like to propose adding a GitHub Actions workflow to automate the Android build process. This would help catch build errors early and provide release-ready APKs automatically.

I have already created a workflow that builds and signs the APK on every push to the master branch.
The documentation I've added explains how contributors can also generate their own jks key to create their own builds for testing during the code review process. The final APK from the CI run is uploaded as a build artifact for easy access.

I am open to any suggestions or feedback on this approach and would be happy to create a pull request.

I hope it helps to grow the project.