feat: add Poe provider support

[roomote]

This PR attempts to address Issue #9512. Feedback and guidance are welcome.

Summary

Adds support for Poe (poe.com) as a provider in Roo Code, leveraging their OpenAI-compatible API.

Changes

• Add Poe model definitions with support for multiple models:
  • GPT models (gpt-4o, gpt-4o-mini, gpt-4-turbo, gpt-3.5-turbo)
  • Claude models (claude-3-5-sonnet, claude-3-5-haiku, claude-3-opus, etc.)
  • Gemini models (gemini-1.5-pro, gemini-1.5-flash)
  • Llama models (llama-3.1-405b, llama-3.1-70b, llama-3.1-8b)
  • Mistral models (mistral-large, mixtral-8x7b)
  • Other models (qwen-2.5-72b, solar-mini)
• Implement PoeHandler using BaseOpenAiCompatibleProvider
• Add Poe to provider registry and configuration system
• Support OpenAI-compatible API endpoint at https://api.poe.com/v1

Testing

• TypeScript compilation passes successfully
• Linting passes with no warnings
• Provider follows the same pattern as other OpenAI-compatible providers (Groq, Fireworks, etc.)

Related

Closes #9512
Previously requested in #6594

---

Important

Adds support for Poe provider with multiple models, integrating it into the provider registry and configuration system.

• Behavior:
  • Adds PoeHandler in src/api/providers/poe.ts using BaseOpenAiCompatibleProvider.
  • Supports multiple models: GPT, Claude, Gemini, Llama, Mistral, and others.
  • Integrates Poe into provider registry in provider-settings.ts and index.ts.
• Models:
  • Defines PoeModelId and poeModels in providers/poe.ts.
  • Sets default model to claude-3-5-sonnet.
• Configuration:
  • Adds poeSchema to providerSettingsSchemaDiscriminated in provider-settings.ts.
  • Updates ProfileValidator to handle Poe in ProfileValidator.ts.
• Misc:
  • Adds PoeHandler export in src/api/providers/index.ts.
  • Updates buildApiHandler in src/api/index.ts to include Poe.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. Found one model capability issue that should be corrected.

• Fix claude-3-5-haiku supportsImages flag (should be true)

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

[roomote]

Claude 3.5 Haiku supports vision capabilities according to Anthropic's documentation. This should be supportsImages: true to match the capability and be consistent with claude-3-haiku which correctly has vision support enabled.

Suggested change

	supportsImages: false,
	supportsImages: true,

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

[faf0]

Implemented in #9515.