nixos/budgie: Add supplemental tooling

https://docs.buddiesofbudgie.org/10.10/developer/workflow/building-budgie-desktop/#supplemental-tooling

nixos/modules/services/desktop-managers/budgie.nix

@@ -158,6 +158,7 @@ in
 
     # https://docs.buddiesofbudgie.org/10.10/developer/workflow/building-budgie-desktop/#compositor-recommendations
     programs.labwc.enable = mkDefault true;
+    programs.gtklock.enable = mkDefault true;
 
     environment.systemPackages =
       with pkgs;
@@ -165,6 +166,7 @@ in
         # Budgie Desktop.
         budgie-backgrounds
         budgie-control-center'
+        budgie-desktop-services
         (budgie-desktop-with-plugins.override { plugins = cfg.extraPlugins; })
         budgie-desktop-view
         budgie-screensaver
@@ -193,6 +195,17 @@ in
         mate.mate-system-monitor
         vlc
 
+        # Supplemental tooling.
+        # See budgie-desktop's with-runtime-dependencies meson option.
+        gammastep
+        grim
+        killall
+        slurp
+        swaybg
+        swayidle
+        wdisplays
+        wlopm
+
         # Desktop themes.
         qogir-theme
         qogir-icon-theme
@@ -243,6 +256,7 @@ in
     xdg.portal.enable = mkDefault true; # for BCC's Applications panel.
     xdg.portal.extraPortals = with pkgs; [
       xdg-desktop-portal-gtk # provides a XDG Portals implementation.
+      xdg-desktop-portal-wlr # for screenshot and screencast.
     ];
     xdg.portal.configPackages = mkDefault [ pkgs.budgie-desktop ];
 
@@ -277,6 +291,7 @@ in
     # Register packages for DBus.
     services.dbus.packages = [
       budgie-control-center'
+      pkgs.budgie-desktop-services
     ];
 
     # Register packages for udev.