Support Pipewire-pulse

[bagnaram]

On systems with pipewire installed, the dependency on pacmd makes this library unusable because that package is not available in pipewire. Provide an option for alternate module detection such as moving to pactl

[sqp]

Thanks for the report, I'll update that when I'll have completed my work on gotk4.
This command was mostly here for convenience and to show how to load the module.
You can launch the same command with just pactl instead of pacmd as shown here: old commit on a fork when I tried to enable auto testing.
exec.Command("pactl", "load-module", "module-dbus-protocol").Run()

I think I'll set pactl as first call and pacmd as backup