AudioTranscriptionResult should include language and other parameters if format=verbose_json is set in the AudioTranscriptionRequest

[tsuz]

Is your feature request related to a problem? Please describe.

I would like to know the language of the transcription.

Describe the solution you'd like

AudioTranscriptionResult should include language (and other parameters)

https://platform.openai.com/docs/api-reference/audio/verbose-json-object

Describe alternatives you've considered

I don't see how I can achieve with this library.

Additional context

OpenAI docs:

https://platform.openai.com/docs/api-reference/audio/verbose-json-object

[tsuz]

I can quickly create a PR if you are okay with it