fix: remove broken Hugging Face documentation link

[roomote]

Summary

Fixes the broken Hugging Face documentation link reported in issue #6334.

Problem

When users click on "Hugging Face documentation" in the provider settings, they get redirected to https://docs.roocode.com/providers/huggingface which returns a 404 error.

Solution

Added "huggingface" to the excluded providers list in the documentation link mapping. This prevents the broken documentation link from being displayed until a proper documentation page is created.

Changes

• Modified webview-ui/src/components/settings/ApiOptions.tsx to exclude Hugging Face from showing documentation links
• Added excludedProviders array to handle providers without documentation pages

Testing

• ✅ All existing tests pass
• ✅ Linting and type checking pass
• ✅ Hugging Face provider settings no longer show the broken documentation link

Related

Closes #6334

---

Important

Excludes huggingface from documentation links in ApiOptions.tsx to prevent 404 errors.

• Behavior:
  • Excludes huggingface from documentation links in ApiOptions.tsx to prevent 404 errors.
  • Adds excludedProviders array to manage providers without documentation.
• Testing:
  • All tests, linting, and type checks pass.
  • Verified huggingface provider no longer shows a broken link.

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[daniel-lxs]

Already fixed