Changes to Create an OpenAI-compatible response

added the new optional request property mode

added the new optional request property reasoning

added the new optional request property region

added the new optional request property service_tier

added the new optional request property conversation

added the new optional request property input

added the new optional request property instructions

added the new optional request property model

added the new optional request property stream

api tag OpenAI Chat added

api tag Chat removed

endpoint added