feat: add HuggingFace provider support

[roomote]

This PR adds support for HuggingFace as an AI provider in Roo Code.

Summary

Implements HuggingFace provider integration as requested in #6124. This allows users to use HuggingFace models through their OpenAI-compatible API endpoint.

Changes

• Added HuggingFace to provider types and schemas
• Implemented HuggingFace API handler using OpenAI-compatible format
• Created HuggingFace models service for dynamic model fetching from HuggingFace API
• Added webview message handlers for HuggingFace model requests
• Created HuggingFace UI component with model selection and inference provider options
• Updated ApiOptions to include HuggingFace provider
• Added translations for HuggingFace provider

Features

• Dynamic model fetching from HuggingFace API with caching
• Support for both text-generation and image-text-to-text models
• Inference provider selection (auto, SambaNova, Fireworks, Together AI, etc.)
• OpenAI-compatible API integration through HuggingFace router endpoint

Testing

• Linting passes
• Type checking passes
• Provider tests pass
• Webview component tests pass

Closes #6124

Co-authored-by: TGlide tglide@users.noreply.github.com

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Important

Adds HuggingFace provider support, enabling model interaction via an OpenAI-compatible API, with UI updates for model selection and configuration.

• Behavior:
  • Adds HuggingFace as a provider in provider-settings.ts and providers/index.ts.
  • Implements HuggingFaceHandler in huggingface.ts for API interaction.
  • Supports text-generation and image-text-to-text models.
• API:
  • Adds getHuggingFaceModels() in huggingface-models.ts for model fetching.
  • Updates webviewMessageHandler.ts to handle requestHuggingFaceModels messages.
• UI:
  • Adds HuggingFace component in HuggingFace.tsx for model and provider selection.
  • Updates ApiOptions.tsx to include HuggingFace in provider options.
  • Adds translations for HuggingFace in settings.json.

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