We should tweak our ESLint rules so that we don't have to import React at the top of each JSX file.

In version 17, React introduced anew JSX Transform that imports React behind the scenes, so manual import by us devs is no longer required. We should take advantage of this simplification.

AC:

• tweak our ESLint so we don't hear complaints when we are no longer importing React (details in linked blog)
• don't worry about import cleanup right now - this can be an incremental effort the whole team can take part in