test(pixi): ignore lib/audio_common from colcon test

as it is a subrepo and apparently it is not possible to ignore folders
from `colcon test`

Author: texhnolyze

pixi.toml

@@ -25,7 +25,7 @@ args = [{ arg = "package", default = "" }]
 description = "Cleans build and install files for all ROS 2 packages or a specific one if given."
 
 [tasks.test]
-cmd = "colcon test --event-handlers console_direct+ --return-code-on-test-failure "
+cmd = "colcon test --packages-ignore=audio_common --event-handlers console_direct+ --return-code-on-test-failure "
 description = "Runs tests for all ROS 2 packages. Add --packages-select <package names> to test specific packages."
 
 [dependencies]
@@ -255,4 +255,3 @@ scripts = [
 default = ["ros", "format"]  # Full development environment (excluding robot-only deps)
 format = ["format"]  # Format only environment
 robot = ["ros", "format", "robot"]  # Robot environment with additional robot-only dependencies
-