Enable Worklets Bundle Mode

Bundle Mode lets worklets access the entire JS bundle (imports inside worklets, etc.). Stable since react-native-worklets 0.10.0. Official setup docs: https://docs.swmansion.com/react-native-worklets/docs/bundleMode/setup

Bundle Mode has three parts: the babel plugin option, the metro config helper, and the metro + metro-runtime patches. The patches are mandatory - the docs label them "recommended", but without them DX is very poor.

Reference implementation: https://github.com/software-mansion-labs/Bundle-Mode-showcase-app

0. Detect current state and environment

Bundle Mode is already ON when all three hold: