add "Model size"

[oncealong]

add "Model size" info, like huggingface:
https://huggingface.co/moonshotai/Kimi-K2.6

[github-actions]

This issue is a feature request to track a new kind of information ("Model size"/parameter count) that isn't currently part of the model catalog schema. Adding it would require schema and validation changes, not just a TOML data fix to models/ or providers/ files.

Per the guidelines, I don't make schema, UI, or workflow changes, so this needs maintainer review and no automated fix was opened.