add notification toggle

modules/home/hyprland/applications/default.nix

@@ -58,6 +58,7 @@ in
   imports = [
     ./bemenu
     ./dmenu-bluetooth
+    ./dunst-toggle
     ./element-desktop
     ./feh
     ./kitty
@@ -135,6 +136,11 @@ in
       bind = [ "$mod SHIFT, m, exec, ${terminal} -T ${musicplayer} -e ${musicplayer}" ];
     };
 
+    notifications = mkAppAttrs {
+      default = "dunst-toggle";
+      bind = [ "$mod, Backspace, exec, ${notifications}" ];
+    };
+
     networksettings = mkAppAttrs {
       default = "networkmanager_dmenu";
       bind = [ "$mod SHIFT, n, exec, ${networksettings}" ];