[BFCL] Add support for Writer models and Palmyra X 004

[samjulien]

This PR adds support for Writer models and our latest Palmyra X 004 to BFCL. Thank you!

[HuanzhiMao]

Thanks for the PR @samjulien !

I noticed that here, you intentionally removed all the response field from the function doc.
For model that doesn't support response field, we add those information to the end of the function description because we don't want information loss (code here). Is there a reason why you chose to do it that way?

[samjulien]

Thanks for the PR @samjulien !

I noticed that here, you intentionally removed all the response field from the function doc. For model that doesn't support response field, we add those information to the end of the function description because we don't want information loss (code here). Is there a reason why you chose to do it that way?

Ah thank you! I’ll add a check for our models there and remove from our handler.