Proposal: Support poe.com as an LLM provider

[PeterDaveHello]

Suggest supporting poe.com as an LLM provider via its OpenAI-compatible API. Poe allows users to easily switch between a wide range of leading models (GPT, Claude, Gemini, Llama, Mistral, Grok, and more) by changing the base URL and API key. This would simplify access, reduce the need to manage multiple provider accounts or keys, and make model selection more flexible for users.

Poe works similarly to services like OpenRouter, providing an OpenAI-compatible API that aggregates access to many popular models under a single endpoint and key.

Poe's API documentation: https://creator.poe.com/docs/external-applications/openai-compatible-api

Open to feedback and suggestions from the community :D

[thdxr]

https://github.com/sst/models.dev

[PeterDaveHello]

@thdxr I've sent sst/models.dev#137. Would you please help review it? Thanks!