Add new tracker for React Native

[Matus Tomlein (matus-tomlein)]

Adds the @snowplow/react-native-tracker package to the monorepo.

This aims to move the React Native tracker to instead of using the iOS and Android trackers as the base for the React Native tracker, to use the JavaScript tracker. The motivation for this is to:

1. support Expo Go (managed workflow) and React Native for Web
2. better support React Native new architecture without the interoperability layer
3. make the tracker easier to maintain going forward (simplifies the project)
4. be able to use JS tracker plugins (or some of them) in the RN tracker and vice versa

The package will continue with the @snowplow/react-native-tracker starting from version 4.1 (or later). We decided for this as opposed to introducing a new package to make it more clear long term that this package replaces the old RN tracker and avoid having two RN packages. We will need to skip v3 (RN tracker is now on v2) in order to sync with the JS tracker versions.

This PR implements the core of the tracker without additional features (such as session, lifecycle tracking) which will be introduced in follow up PRs. It tries to maintain the API from the RN tracker but for the createTracker method, this was not possible and I think it's better to follow the newTracker convention in the JS tracker. So the newTracker method signature is a breaking change.

I have deployed the package under the version 4.0.1-dev.1 and added a very simple example app in the examples repo using it: snowplow-industry-solutions/snowplow-javascript-tracker-examples#60 (we'll improve it over time)

[bundlemon]

BundleMon

Files added (6)

Status	Path	Size	Limits
✅	trackers/javascript-tracker/dist/sp.js	+24.49KB	30KB / +10%
✅	libraries/browser-tracker-core/dist/index.mod ule.js	+23.44KB	25KB / +10%
✅	libraries/tracker-core/dist/index.module.js	+19.48KB	20KB / +10%
✅	trackers/browser-tracker/dist/index.umd.min.j s	+17.4KB	20KB / +10%
✅	trackers/javascript-tracker/dist/sp.lite.js	+17.33KB	20KB / +10%
✅	trackers/browser-tracker/dist/index.module.js	+3.49KB	5KB / +10%

Total files change +105.62KB 0%

Final result: ✅

View report in BundleMon website ➡️

---

Current branch size history

[Greg Leonard (greg-el)]

Nice work! LGTM