(feat): Add Baseten Provider

[AlexKer]

Related GitHub Issue

Similar to #3034
No issue. This is direct message request from Roo Code team (Matt Rubens)

Description

• Add Baseten provider type definitions with 10 models
• Implement BasetenHandler extending BaseOpenAiCompatibleProvider
• Add Baseten UI component for API key configuration
• Add validation logic for Baseten API key
• Include Baseten in provider settings schema and constants
• Add Baseten translations (basetenApiKey, getBasetenApiKey)
• Add basetenApiKey to SECRET_STATE_KEYS for proper storage
• Add Baseten provider documentation
• Default model: moonshotai/Kimi-K2-Thinking

Test Procedure

Build and run the extension from the add-baseten-provider branch.
Open the Roo Code extension view.
Navigate to the Settings panel.
In the "Providers" section, select "Baseten" from the "API Provider" dropdown.
Verify: The label for the API key input field reads "Base API Key" and the button below it reads "Get Baseten API Key".
Run Roo Code.

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

Does this PR necessitate updates to user-facing documentation?

• No documentation updates are required.
• Yes, documentation updates are required. (Please describe what needs to be updated or link to a PR in the docs repository).

New docs are added in this PR.

---

Important

Add Baseten provider integration with model definitions, UI components, and API key configuration.

• Provider Integration:
  • Add BasetenHandler in src/api/providers/baseten.ts extending BaseOpenAiCompatibleProvider.
  • Register BasetenHandler in src/api/index.ts and src/api/providers/index.ts.
  • Define basetenModels and BasetenModelInfo in packages/types/src/providers/baseten.ts.
• UI Components:
  • Add Baseten component in webview-ui/src/components/settings/providers/Baseten.tsx for API key input.
  • Update ApiOptions.tsx to include Baseten in provider selection.
  • Add Baseten translations in webview-ui/src/i18n/locales/en/settings.json.
• Configuration and Validation:
  • Add basetenApiKey to SECRET_STATE_KEYS in packages/types/src/global-settings.ts.
  • Include Baseten in providerSettingsSchema in packages/types/src/provider-settings.ts.
  • Add validation for basetenApiKey in webview-ui/src/utils/validate.ts.
• Documentation:
  • Add docs/providers/baseten.md for Baseten provider setup and usage.

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[roomote]

Rooviewer   See task on Roo Cloud

Re-review completed. No new issues found. The recent changes improve reasoning content parsing by supporting both reasoning_content and reasoning fields.

• Fix typo in model description: "Septemeber" → "September"

Previous reviews

• ac1e922: Review #1
• d47be5d: Review #2
• a1ce6ea: Review #3
• 2fef8f4: Review #4

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}