Feature request: save egress recordings as .wav

[ap-con]

Hey Livekit team!

I would like to request new feature: saving egress recordings as .wav file, not just mp4, webm, ogg.

Thank you!

[HavenCTO]

@theomonnom would you accept a PR for a ParticipantRecorder class which will allow more customisation when saving livestream (doesn't support wav right now but I can add it).

https://github.com/Haven-hvn/python-sdks/blob/aa5ba64495a0061b55c500557121ea47be575cca/livekit-rtc/livekit/rtc/recorder.py#L83