[refactor] Remove duplicated useIsomorphicEffect (#5694)

* Import useIsomorhicEddext instead of creating new one

* Update create-use-external-events.ts

* fix eslint

packages/@mantine/core/src/core/utils/create-use-external-events/create-use-external-events.ts

@@ -1,11 +1,9 @@
-import { useEffect, useLayoutEffect } from 'react';
+import { useIsomorphicEffect } from '@mantine/hooks';
 
 function dispatchEvent<T>(type: string, detail?: T) {
   window.dispatchEvent(new CustomEvent(type, { detail }));
 }
 
-const useIsomorphicEffect = typeof window !== 'undefined' ? useLayoutEffect : useEffect;
-
 export function createUseExternalEvents<Handlers extends Record<string, (detail: any) => void>>(
   prefix: string
 ) {