Automate Play Store publication 🤖

[opatry]

Ideally, a workflow triggered on specific tag pattern should trigger the build & upload accordingly.

• [x] store Play Store secrets in a GPG encrypted file
• [x] add a Github secret to decrypt encrypted secret files of the repository
• [x] use Fastlane to handle the publication
  • [x] will need to support Android aab most likely
• [x] trigger when a tag is set using a specific workflow
  • vX.Y.Z-store or vX.Y.Z-playstore or something else?
  • auto bump before/after, how to tweak & commit toml file version values?
  • manual job (with parameter?) instead of tag workflow?