add notification toggle

modules/home/hyprland/applications/dunst-toggle/default.nix

@@ -0,0 +1,18 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.wayland.windowManager.hyprland;
+  app = cfg.applications.notifications.default;
+
+  inherit (lib) mkIf;
+in
+{
+  config = mkIf (cfg.enable && app == "dunst-toggle") {
+    home.packages = [ (import ./dunst-toggle.nix { inherit config pkgs; }) ];
+  };
+}

modules/home/hyprland/applications/dunst-toggle/dunst-toggle.nix

@@ -0,0 +1,11 @@
+{ config, pkgs, ... }:
+
+let
+  dunst = "${pkgs.dunst}/bin/dunstctl";
+  pkill = "${pkgs.procps}/bin/pkill";
+  signal = "${toString config.programs.waybar.settings.mainBar."custom/notifications".signal}";
+in
+(pkgs.writeShellScriptBin "dunst-toggle" ''
+  ${dunst} set-paused toggle
+  ${pkill} -RTMIN+${signal} waybar
+'')