Add a Continuous delivery process using Github Actions and Fastlane

should include: 

* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Run manually and by commit to Release branch
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Run Begin of the insertiontestsEnd of the insertion Begin of the deletion tests End of the deletion
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Sign the build
* [ ] Upload to Begin of the insertionGoogle PlayEnd of the insertion Begin of the deletion Firebase Beta appEnd of the deletion