webRTC support with Ephimeral Token

### Description of the feature request:

I am using OpenAI Realtime API, and I could directly connect the client with OpenAI server using webRTC and ephemeral token. Whereas, in gemini live API, I have to setup the websocket proxy server and websocket browser client to do the same.

I would really like to have the gemini live API support direct webRTC connection similar to OpenAI. This way the latency and scalability issues are very well addressed. also, I don't have to worry about signaling server needs if it is directly supported by gemini.

### What problem are you trying to solve with this feature?

latency, reliable and scalable way of building apps using gemini live API, through webRTC implementations.

### Any other information you'd like to share?

_No response_