feat: Implement Dank Launcher button on the Dock

- Configurable with custom icons/logos
- Respects light/dark theme
- Drag & Drop in place

quickshell/Modules/Dock/DockAppButton.qml

@@ -208,7 +208,7 @@ Item {
             targetIndex = -1;
             originalIndex = -1;
 
-            if (dockApps && !didReorder) {
+            if (dockApps) {
                 dockApps.draggedIndex = -1;
                 dockApps.dropTargetIndex = -1;
             }