[crud] Only export uRC when flag is enabled

It's tricky to do feature detection of uRC currently because it's always present on the export. Let's conditionally export it instead.

Author: poteto

packages/react/src/ReactHooks.js

@@ -229,7 +229,7 @@ export function useEffectEvent<Args, F: (...Array<Args>) => mixed>(
   return dispatcher.useEffectEvent(callback);
 }
 
-export function useResourceEffect(
+function useResourceEffect_(
   create: () => mixed,
   createDeps: Array<mixed> | void | null,
   update: ((resource: mixed) => void) | void,
@@ -250,6 +250,10 @@ export function useResourceEffect(
   );
 }
 
+export const useResourceEffect = enableUseResourceEffectHook
+  ? useResourceEffect_
+  : null;
+
 export function useOptimistic<S, A>(
   passthrough: S,
   reducer: ?(S, A) => S,