feat: add linux activation watermark

src/LinuxActivation.qml

@@ -0,0 +1,55 @@
+// Credits go to outfoxxed: https://git.outfoxxed.me/outfoxxed/quickshell-examples/src/branch/master/activate_linux/shell.qml
+import Quickshell
+import QtQuick
+import QtQuick.Layouts
+import Quickshell.Wayland
+
+Variants {
+    // Create the panel once on each monitor.
+    model: Quickshell.screens
+
+    PanelWindow {
+        id: w
+
+        property var modelData
+        screen: modelData
+
+        anchors {
+            right: true
+            bottom: true
+        }
+
+        margins {
+            right: 50
+            bottom: 50
+        }
+
+        width: content.width
+        height: content.height
+
+        color: "transparent"
+
+        // Give the window an empty click mask so all clicks pass through it.
+        mask: Region {}
+
+        // Use the wlroots specific layer property to ensure it displays over
+        // fullscreen windows.
+        WlrLayershell.layer: WlrLayer.Overlay
+
+        ColumnLayout {
+            id: content
+
+            Text {
+                text: "Activate Linux"
+                color: "#50ffffff"
+                font.pointSize: 22
+            }
+
+            Text {
+                text: "Go to Settings to activate Linux"
+                color: "#50ffffff"
+                font.pointSize: 14
+            }
+        }
+    }
+}

src/shell.qml

@@ -3,4 +3,5 @@ import Quickshell
 // for ShellRoot and PanelWindow
 ShellRoot {
     Bar {}
+    LinuxActivation {}
 }