displays: add configurator (Beta)

- Position, resolution, refresh, orientation, VRR
- niri, Hyprland, MangoWC
- Rely on wlr-output for reading data, compositors to write output
  configurations
- Re-organize display setting group

quickshell/Modals/Common/DankModal.qml

@@ -273,8 +273,8 @@ Item {
         anchors {
             left: true
             top: true
-            right: root.useSingleWindow ? true : undefined
-            bottom: root.useSingleWindow ? true : undefined
+            right: root.useSingleWindow
+            bottom: root.useSingleWindow
         }
 
         WlrLayershell.margins {