audio/transcriptions may specify language

[openmynet]

I see that both edgen_rt_whisper_cpp::TranscriptionArgs and whisper_cpp::WhisperParams offer a language field, which I hope means that specifying the desired language should work when using /v1/audio/transcriptions.

[pedro-devv]

The endpoint arguments aren't properly passed to whisper_cpp at the moment, but something that will definitely get addressed.