feat: Add Cloud.ru Foundation Models provider

[roomote]

Description

This PR attempts to address Issue #9320 by adding support for Cloud.ru Foundation Models (CFM) as a new provider in Roo Code. Feedback and guidance are welcome!

Changes

• ✨ Added new Cloud.ru provider with support for GigaChat and Qwen models
• 🏗️ Implemented CloudRuHandler extending BaseOpenAiCompatibleProvider for OpenAI-compatible API integration
• 📝 Added model definitions for:
  • GigaChat models (Max, Pro, Plus, base, 2-Max)
  • Qwen Coder models (480B, 32B, 7B variants)
• 🔧 Updated provider settings and type definitions to include Cloud.ru
• ✅ Added comprehensive test coverage for the new provider
• 🎨 Updated UI hooks to support Cloud.ru model selection

Implementation Details

The Cloud.ru provider is implemented as an OpenAI-compatible provider, allowing it to leverage existing infrastructure while providing access to Cloud.ru's Foundation Models. Users can:

1. Select "Cloud.ru Foundation Models" from the provider dropdown
2. Configure their Cloud.ru API key in settings
3. Choose from available GigaChat and Qwen models
4. Use these models for all standard Roo Code tasks (code generation, reasoning, refactoring, etc.)

Testing

• ✅ All unit tests pass for the new CloudRuHandler
• ✅ Type checking passes
• ✅ Linting passes

Related Issue

Closes #9320

Checklist

• Code follows the project's style guidelines
• Tests have been added for new functionality
• All tests pass
• Documentation has been updated (model descriptions included)
• The PR is linked to the relevant issue

---

Important

Adds Cloud.ru Foundation Models provider with GigaChat and Qwen models, including handler implementation, UI support, and tests.

• Behavior:
  • Adds Cloud.ru provider with GigaChat and Qwen models support in cloudru.ts.
  • Implements CloudRuHandler in cloudru.ts for OpenAI-compatible API.
  • Updates provider-settings.ts to include Cloud.ru in provider settings and schemas.
  • Updates index.ts in api and providers to include CloudRuHandler.
  • Updates useSelectedModel.ts to support Cloud.ru model selection.
• Models:
  • Defines GigaChat and Qwen models in cloudru.ts.
• Testing:
  • Adds cloudru.spec.ts for testing CloudRuHandler behavior, including API key handling, model selection, message creation, and temperature configuration.
• Misc:
  • Updates MODELS_BY_PROVIDER in provider-settings.ts to include Cloud.ru models.

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[roomote]

Rooviewer   See task on Roo Cloud

Review completed. Found one minor documentation issue with the test execution command.

• Update test command comment to use correct workspace-relative path

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

[roomote]

The test command in this comment will fail because tests must be run from the workspace containing the vitest dependency. According to the project's test execution rules in .roo/rules/rules.md, backend tests should be run with cd src && npx vitest run api/providers/__tests__/cloudru.spec.ts to avoid the "vitest: command not found" error.

Suggested change

	// npx vitest run api/providers/__tests__/cloudru.spec.ts
	// cd src && npx vitest run api/providers/__tests__/cloudru.spec.ts

_{Fix it with Roo Code or mention @roomote and request a fix.}

[gdagil]

I'm creating PR #9326 to fix the /v1/models flow and adjust the legacy OpenAI API handling for the GigaChat model family