Support React 19

[ianzone]

Introduction

React 19 has been released and I can't wait to use its new features.

Details

Update react from rn to version 19.

[cortinico]

React 19 will be available in a future version of React Native. We don't have a target version fixed yet but it will most likely be either 0.77 or 0.78.

I'll update this issue once we have more precise information