Add support for HuggingFace mirror (hf-mirror.com) to improve download
speeds in regions where huggingface.co access is slow.
- Support HF_ENDPOINT environment variable detection
- Automatically switch to hf-mirror.com when HF_ENDPOINT is set
- Apply to Docker, VMware, and VirtualBox providers
- Maintain backward compatibility with default huggingface.co URLs
Users can now set HF_ENDPOINT=https://hf-mirror.com to use the mirror.