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/audio/src/audio_settings.rs

@@ -0,0 +1,33 @@
+use anyhow::Result;
+use gpui::App;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use settings::{Settings, SettingsSources};
+
+#[derive(Deserialize, Debug)]
+pub struct AudioSettings {
+    /// Opt into the new audio system.
+    #[serde(rename = "experimental.rodio_audio", default)]
+    pub rodio_audio: bool, // default is false
+}
+
+/// Configuration of audio in Zed.
+#[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug)]
+#[serde(default)]
+pub struct AudioSettingsContent {
+    /// Whether to use the experimental audio system
+    #[serde(rename = "experimental.rodio_audio", default)]
+    pub rodio_audio: bool,
+}
+
+impl Settings for AudioSettings {
+    const KEY: Option<&'static str> = Some("audio");
+
+    type FileContent = AudioSettingsContent;
+
+    fn load(sources: SettingsSources<Self::FileContent>, _cx: &mut App) -> Result<Self> {
+        sources.json_merge()
+    }
+
+    fn import_from_vscode(_vscode: &settings::VsCodeSettings, _current: &mut Self::FileContent) {}
+}