fix: revert "remove node-fetch from js-client package (#6383)" (#6392)

Author: mrstork

packages/js-client/src/types.ts

@@ -1,7 +1,6 @@
 import type { ReadStream } from 'node:fs'
 
 import type { operations } from '@netlify/open-api'
-// TODO: remove once we support native fetch
 import type { RequestInit } from 'node-fetch'
 
 /**