Add support for Azure OpenAI Realtime api.

[joslat]

Same model as OpenAI but thorugh Azure AI Foundry. (still seems to be named internally Azure OpenAI Service).

I refactored/leaned the code from Microsoft example here:
https://github.com/joslat/JSB/blob/main/src/RealTimeAudioApiTraditionalExample/Helpers/RealtimeClientProvider.cs