BioGPT Token Classification
### Feature request

It would be nice to have this available.

### Motivation

working on biomedical token classification datasets and I would like to try BioGPT with them.

### Your contribution

I could send a PR if you want. I guess it shouldn't be too hard.
Yes, feel free to contribute :)<|||||>sure, Let me work on it<|||||>> sure, Let me work on it

Are you working on it? Else I will take it up.<|||||>@kurchi1205 Am working on it . The problem is that biogpt doesnt have fast tokenizer . Currenlty am in a testing phase