Fix conflicting audio role config: remove pulseaudio, keep pipewire

Remove services.pulseaudio configuration that conflicted with
services.pipewire. PipeWire replaces PulseAudio and provides
compatibility through pulse.enable.

Also added alsa.enable and alsa.support32Bit for better ALSA support.

roles/audio/default.nix

@@ -21,17 +21,11 @@ in
 
       services.pipewire = {
         enable = true;
+        alsa.enable = true;
+        alsa.support32Bit = true;
         pulse.enable = true;
       };
 
-      services.pulseaudio = {
-        package = pkgs.pulseaudioFull;
-        extraConfig = ''
-          load-module module-combine-sink
-          load-module module-switch-on-connect
-        '';
-      };
-
       services.squeezelite = {
         #enable = true;
         pulseAudio = true;