isolated pre-update build steps

Michael Pöhn
2026-03-03T00:23:11Z

@eighthave suggested to re-structure some of the tasks from `update` into separate steps that can run inside a build vm/container. Particularly only for tasks which are specific to one single app:

* parsing metadata from the APK
* extracting the icon and processing to PNG
* reading Fastlane/Triple-T from the source repo
* network fetches of _funding.json_
* other things?