add Korean HateSpeech dataset
It looks like you forgot to `make style` (I forget it a lot too 🤦 )
+ add dummy data hi @cceyda 👋, thanks for the hint! it looks like i've run into some other errors though in `_split_generators` or `_generate_examples`.  do you have any idea of what's wrong here? 😅 I get the same errors on another pr too, so it probably has something to do with circleci, waiting on help. the `RemoteDatasetTest ` error on the CI is fixed on master so it's fine merging since the CI is fixed on master