Add streaming support in whisper.cpp server

[qxprakash]

Currently, streaming is only available when executing through the command-line interface. Could support for streaming be implemented in whisper.cpp, enabling the real-time transcription of an audio stream and the streaming of the transcribed text back to the user through a persistent WebSocket connection or Server side events ?

[RangerMauve]

I'd skip the websocket and do a regular HTTP POST with the stream and have the response be a stream of text. Easy enough to plug into something like the MediaStream recording API into a streaming fetch and stram the response body using an async iterator or w/e.

Easier to integrate with curl, too.