bar: right click right side for next track

.config/quickshell/modules/bar/Bar.qml

@@ -6,6 +6,7 @@ import QtQuick.Controls
 import QtQuick.Layouts
 import Quickshell
 import Quickshell.Io
+import Quickshell.Services.Mpris
 
 Scope {
     id: bar
@@ -258,6 +259,9 @@ Scope {
                         if (event.button === Qt.LeftButton) {
                             openSidebarRight.running = true
                         }
+                        else if (event.button === Qt.RightButton) {
+                            MprisController.activePlayer.next()
+                        }
                     }
                     // Scroll to change volume
                     WheelHandler {