add shadows to bar modules

modules/bar/Clock.qml

@@ -1,11 +1,23 @@
+pragma ComponentBehavior: Bound
 import Quickshell
 import QtQuick
+import QtQuick.Effects
 import qs
 import qs.widgets
 import qs.settings
 
 Rectangle {
     id: root
+    layer.enabled: true
+    layer.effect: MultiEffect {
+        id: dropShadow
+        source: root
+        shadowEnabled: true
+        shadowHorizontalOffset: 4
+        shadowVerticalOffset: 2
+        shadowOpacity: 0.5
+        shadowColor: "#020202"
+    }
     clip: true
     required property double moduleHeight
     implicitHeight: moduleHeight