Add cosmos library

[pcuenca]

This enables downloads once these models are assigned the cosmos library. Snippets can come later.

[Vaibhavs10]

Nice! Thanks! Should be much more easier to have snippets once/ if in transformers.

[Haoxiang-Wang]

Thank you @pcuenca !

I am the Cosmos team member who is in charge of our model uploading to Hugging Face Hub. I noticed most of our Cosmos-1.0 models have no download statistics counted yet (see the screenshot below), which concerns us.

@Vaibhavs10 @julien-c Please merge this MR as soon as possible, and I will tag all Cosmos-1.0 models with the cosmos library. I think this can turn on the download counter, right?

[Vaibhavs10]

Hi @Haoxiang-Wang - It should merge today, note after the PR is merged and after a deployment. It'd take 24-48 hours for download counters to come in effect.

and, yes, please do update the library_name to cosmos 🤗

[pcuenca]

Thanks for the confirmation @Haoxiang-Wang, merging now. This is an example PR to update the repos: https://huggingface.co/nvidia/Cosmos-1.0-Diffusion-7B-Text2World/discussions/1/files