Improve HF integration

Hi,

Niels here from the open-source team at Hugging Face. Thanks for making the model and demo available on the hub :)

We could also integrate loading checkpoints from the hub using a `from_pretrained` method as we did for SAM-2: https://github.com/facebookresearch/sam2?tab=readme-ov-file#load-from--hugging-face. The checkpoints are downloaded quite a lot: https://huggingface.co/models?sort=downloads&search=facebook%2Fsam2.

I see currently downloads aren't working for your model: https://huggingface.co/facebook/EdgeTAM, so integrating with the hub would solve that.

Let me know if you are interested.