[FEATURE REQUEST] Move bitrise.yml to here, so that it could be checked externally

[jesmrec]

Store bitrise.yml file in GH, so that anyone can contribute in CI

https://devcenter.bitrise.io/en/builds/configuring-build-settings/managing-an-app-s-bitrise-yml-file.html

TASKS

• [ ] Research (if needed)
• [ ] Create branch feature/feature_name
• [ ] Development tasks
  • [ ] Push bitrise.yml here
  • [ ] Make actions in bitrise to use the GH yml file
• [ ] Code review and apply changes requested
• [ ] Design test plan
• [ ] QA
• [ ] Merge branch feature/feature_name into master

PR

• App
• Library (if needed)