Add interface for HuggingFace Hub

[caufieldjh]

No description provided.

[caufieldjh]

There's a dependency of huggingface_hub for this - will add updated pyproject.toml but poetry is being stupefyingly slow

[caufieldjh]

Unfortunately the HF API is prone to timeouts, so the next step (different PR) may need to be local loading of HF models.

[caufieldjh]

Tests will go in next round of Huggingface additions