Add BarService, use signals to check state of bar and update widgets accordingly

Services/BarService.qml

@@ -0,0 +1,36 @@
+pragma Singleton
+
+import QtQuick
+import Quickshell
+import qs.Commons
+
+Singleton {
+  id: root
+
+  // Bar position property
+  property string position: Settings.data.bar.position
+
+  // Signal emitted when bar position changes
+  signal barPositionChanged(string newPosition)
+
+  // Watch for changes in Settings.data.bar.position
+  Connections {
+    target: Settings
+    function onDataChanged() {
+      if (Settings.data.bar.position !== root.position) {
+        root.position = Settings.data.bar.position
+        root.barPositionChanged(root.position)
+      }
+    }
+  }
+
+  // Also watch for direct changes to the position property
+  onPositionChanged: {
+    root.barPositionChanged(position)
+  }
+
+  // Function to change bar position
+  function setPosition(newPosition) {
+    Settings.data.bar.position = newPosition
+  }
+}