Export Fetcher type

[sergiodxa]

There's a Fetcher type which is the return value of the useFetcher hook. Right now it's not exported and if you need it to must import it as.

import type { Fetcher } from "@remix-run/react/transition";

I need to import this at my work app to be able to correctly type the props of a component which receives the fetcher as a prop, because I need the parent to know the state of that fetcher.

I see no reason to don't export this type from @remix-run/react directly.