add pipewire module

modules/bar/Pw.qml

@@ -0,0 +1,25 @@
+import Quickshell.Services.Pipewire
+import Quickshell.Widgets
+import QtQuick
+import qs
+import qs.widgets
+
+WrapperRectangle {
+    id: root
+    color: Colors.base01
+    required property int barHeight
+    property double vertMargin: barHeight / 4 - 4
+    property PwNode defaultAudio: Pipewire.ready ? Pipewire.defaultAudioSink : null
+    property string status: defaultAudio.audio.muted? "mut " : "vol "
+    topMargin: vertMargin
+    bottomMargin: vertMargin
+    leftMargin: 8
+    rightMargin: 8
+    PwObjectTracker {
+        objects: [Pipewire.ready ? Pipewire.defaultAudioSink : null]
+    }
+    child: StyledText {
+        text: root.status +  Math.floor(root.defaultAudio.audio.volume * 100) + "%"
+        opacity: root.defaultAudio.audio.muted ? 0.6 : 1.0
+    }
+}