doc: improve `fsPromises.copyFile()` documentation and code example
Update the documentation and code example for fsPromises.copyFile()
fs/promises
module to provide better guidance and error handling.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Update the documentation and code example for fsPromises.copyFile()
fs/promises
module to provide better guidance and error handling.