Caching React Native Builds on S3 and R2 With Rock

Rock, a React Native build framework by Callstack, now supports caching native iOS and Android build artifacts on AWS S3 and Cloudflare R2. Previously limited to GitHub Artifacts, teams can now configure the `@rock-js/provider-s3` package to store and reuse native builds across their team. Since up to 95% of commits in large React Native apps only touch JavaScript, this can eliminate redundant native builds and reduce CI compute costs by up to 20x. The new feature also introduces a v2 of the `callstackincubator/ios` GitHub Action that handles building, uploading, downloading, and deleting artifacts from any supported provider.