Add HF model cards with carbon costs for training

[jacobbieker]

Detailed Description

HF model hub allows for model cards for models uploaded there, and they have a section for more standardized reporting of carbon costs associated with training that model. Adding that helps keep OCF transparent in making a net decrease in carbon emissions.

Context

Possible Implementation

[JackKelly]

Great idea!

CC'ing @flowirtz because Flo has done some work on this in the past...

[flowirtz]

Yeah, we should definitely do that, good point @jacobbieker. I've done some work on measuring the public cloud emissions (and want to do some work for leonardo), but I think that's less relevant here.