Add Rodio audio pipeline as alternative to current LiveKit pipeline (#36607)

Rodio parts are well tested and need less configuration then the livekit
parts. I suspect there is a bug in the livekit configuration regarding
resampling. Rather then investigate that it seemed faster & easier to
swap in Rodio.

This opens the door to using other Rodio parts like:
 - Decibel based volume control
 - Limiter (prevents sound from becoming too loud)
 - Automatic gain control

To use this add to settings:
```
  "audio": {
    "experimental.rodio_audio": true
  }
```

Release Notes:

- N/A

Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Antonio Scandurra <me@as-cii.com>

crates/livekit_client/src/lib.rs

@@ -24,8 +24,11 @@ mod livekit_client;
 )))]
 pub use livekit_client::*;
 
-// If you need proper LSP in livekit_client you've got to comment out
-// the mocks and test
+// If you need proper LSP in livekit_client you've got to comment
+// - the cfg blocks above
+// - the mods: mock_client & test and their conditional blocks
+// - the pub use mock_client::* and their conditional blocks
+
 #[cfg(any(
     test,
     feature = "test-support",