[Feature Request]: Provide openai style api

[HGGshiwo]

Is there an existing issue for the same feature request?

• I have checked the existing issues.

Is your feature request related to a problem?

No response

Describe the feature you'd like

I want to use chatgpt-next as the frontend, but ragflow api is different than any other popular model provider api. If want to use history, must provide a conversation id, rather than pass the historys as a praram, and it is hard to convert it to any openai style api.

I hope ragflow can provide an openai style api, so It can integrating different frontends for better suitability.

Describe implementation you've considered

No response

Documentation, adoption, use case

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Additional information

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