feat(api): support all OpenAI-compatible interfaces including local models and remote gateways

[lopins]

• Remote Gateways:

  • fruitbars/simple-one-api
  • songquanpeng/one-api
  • Calcium-Ion/new-api
  • xusenlinzy/api-for-open-llm
  • BerriAI/litellm
  • Portkey-AI/gateway

• Local Models:

  • [x] LMStudio API
  • [x] Ollama API
  • gpt4all API
  • Jan
  • Anything LLM'