Summary

This PR moves the TypeScript code we had under the folder npm/rome inside a new folder called js-api. The new package is called @rometools/js-api. Any suggestions for a better name?

As agreed, we want to make the JS APIs an opt-in feature only for people that really wants to use Rome via JS. This will make the main package rome really slim.

What's done:

• update the github workflows
• moved scripts and packages under the new folder
• created a non-final README.md file

What I will do in a different PR:

• implement the final touches for the README.md
• implement the workflow for publishing the package automatically (and maybe the nightly build too)

Test Plan

The existing CI should work and pass