OnSpaceAI/expo ? reverse-engineered prompt

Build me an open source framework for making universal native apps with React that works on Android, iOS, and the web.

I want a clean monorepo that includes the core app runtime, shared libraries for native features, a command line tool, a sample app for testing, starter templates, and documentation. It should feel like a real developer platform, so someone can create a new app, run it locally, and test it on different platforms without a lot of setup. Also include the basics for shipping and maintaining it, like build scripts, release notes, contribution info, and a docs site.

Use modern TypeScript and keep the code organized so it is easy to extend with new modules later. If you need to look up current docs or best practices online, go ahead. The main goal is to make it simple for developers to build one app and have it run everywhere.