New rule for preventing flushing

[Belco90]

Name for new rule

no-flush

Description of the new rule

The goal of this rule would be preventing any flush attempt, like await act(() => Promise.resolve()).

I can't think of any other flush mechanism in Testing Library for now, so we can start reporting the previous scenario and add more in the future if needed.

Testing Library feature

Appearance and Disappearance. Usually, dealing with async behaviors is a matter of waiting for something in the UI to appear/disappear.

Testing Library framework(s)

All of them.

What category of rule is this?

Warns about a potential error

Optional: other category of rule

No response

Code examples

await act(() => Promise.resolve())

Anything else?

No response

Do you want to submit a pull request to make the new rule?

Yes