feat: add screenshare audio with muting capabilities

[Dadadah]

This PR adds audio to the screenshare functionality of Stoat. It also adds the ability to mute and change volume of streams. Audio is defaultly muted on screen shares to prevent surprises.

Requires #1124

The stream volume data is stored in the voice state. This was an opinionated decision as I do not think that stream volume should persist through refreshes. It is easy to change it to use the stored settings states instead if the stream volume should remain through refreshes.

Stream volume and mutes are stored in the voice data store state so that restreams keep volume levels.

Closes #1070

[Pecacheu]

I'm 50/50 on if stream/user volume should persist through refreshes, but I do recall one of the other maintainers saying that feature should be added before. No clue if there's any consensus on that, though.

[Dadadah]

Setting as draft as it seems to have broken on wayland.

[gabrielfordevelopment]

The stream volume data is stored in the voice state

I think it would be better to persist the stream audio settings. In scenarios like a quick reconnect or a page refresh, having to readjust the volume and mute state every time is quite frustrating. From a UX perspective, it's much cleaner to remember the user's last choice; they can always manually change it later if needed.

If we want to make it more advanced in the future, we could offer a setting to toggle between session-only and global persistence. But at the very least, a simple refresh shouldn't wipe out the user's manual adjustments.

[Dadadah]

Wayland support for audio screen sharing on the desktop client is a can of worms so I'm gonna mark this as ready for review and when I merge the desktop pr I'll add a TODO for wayland support and get to it in the coming weeks.