HuggingFace `LogitsProcessor` to accept also list of compiled grammars

[lukaszkolodziejczyk]

Thanks for this amazing library!

I'd like to be able to provide different compiled grammars within single batch. I couldn't find a way to do this and I believe changes proposed in this PR are one way to enable that.

I'd appreciate your comment and if I should pursue work on this PR. Thanks!

[Ubospica]

#275