Adding alsa lib and cpal

lightsabre_backend/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2024"
 
 [dependencies]
 artnet_protocol = "0.4.3"
+cpal = "0.16.0"
 crossbeam = "0.8.4"
 ctrlc = { version = "3.4.7", features = ["termination"] }
 env_logger = "0.11.8"
@@ -12,7 +13,6 @@ log = "0.4.27"
 nix = "0.30.1"
 rpi-mailbox = "0.3.0"
 rppal = "0.22.1"
-# tokio = { version = "1.45.1", features = ["full"] }
 
 [features]
 default = ["rpizero2", "16channel"]