feat: Implement Control Center custom button basic framework

Modules/ControlCenter/Widgets/CustomButton.qml

@@ -0,0 +1,34 @@
+import QtQuick
+import Quickshell
+import qs.Commons
+import qs.Services
+import qs.Widgets
+
+// Dummy comment to force re-evaluation
+Item {
+  id: root
+
+  // Widget properties
+  property string widgetId: "CustomButton"
+  property var widgetSettings: {} // This will be populated from settings
+
+  // Use settings or provide defaults
+  readonly property string customIcon: widgetSettings.icon || "heart"
+  readonly property string exec: widgetSettings.exec || ""
+  readonly property string tooltipText: widgetSettings.tooltipText || "Custom Button"
+
+  implicitWidth: button.implicitWidth
+  implicitHeight: button.implicitHeight
+
+  NIconButton {
+    id: button
+    icon: customIcon
+    tooltipText: tooltipText
+    onClicked: {
+      if (exec) {
+        Quickshell.execDetached(["sh", "-c", exec])
+        Logger.i("CC:CustomButton", `Executing command: ${exec}`)
+      }
+    }
+  }
+}