Mobile Starfish for React Native overview

[krystofwoldrich]

Description

This issue will contain an overview of the work done in RN SDK related to Starfish.

### Done 
- [ ] https://github.com/getsentry/sentry-react-native/pull/3588
- [ ] https://github.com/getsentry/sentry-react-native/pull/3654
- [ ] https://github.com/getsentry/sentry-docs/pull/9443

### Planned
- [ ] https://github.com/getsentry/sentry-react-native/issues/3445
- [ ] https://github.com/getsentry/sentry-react-native/issues/2915