This adjusts our implementation of the Livekit presence event to match the NIP (https://github.com/nostr-protocol/nips/pull/2238#issuecomment-4057645310). Specifically we now expect the user's Nostr pubkey in the `participant` tag instead of the livekit identity string.
I also fixed a bug I found where a malformed `participant` tag would crash the rendering of VoiceWidget, causing it to appear frozen.
There is a corresponding zooid PR [here](https://github.com/coracle-social/zooid/pull/11)
Co-authored-by: mplorentz <mplorentz@noreply.gitea.coracle.social>
Reviewed-on: https://gitea.coracle.social/coracle/flotilla/pulls/101
Co-authored-by: Matt Lorentz <mplorentz@noreply.coracle.social>
Co-committed-by: Matt Lorentz <mplorentz@noreply.coracle.social>
