quickshell: add click handler to open nm-connection-editor

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings/hyprland.nix

@@ -691,6 +691,16 @@ in
                                       font.pixelSize: 14
                                   }
                               }
+
+                              Process {
+                                  id: nmEditorProc
+                                  command: ["${pkgs.networkmanagerapplet}/bin/nm-connection-editor"]
+                              }
+
+                              MouseArea {
+                                  anchors.fill: parent
+                                  onClicked: nmEditorProc.running = true
+                              }
                           }
 
                           // Tray icons inline