blueman: add module for new systemd services

nixos/modules/module-list.nix

@@ -281,6 +281,7 @@
   ./services/databases/virtuoso.nix
   ./services/desktops/accountsservice.nix
   ./services/desktops/bamf.nix
+  ./services/desktops/blueman.nix
   ./services/desktops/deepin/deepin.nix
   ./services/desktops/dleyna-renderer.nix
   ./services/desktops/dleyna-server.nix

nixos/modules/services/desktops/blueman.nix

@@ -0,0 +1,25 @@
+# blueman service
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.blueman;
+in {
+  ###### interface
+  options = {
+    services.blueman = {
+      enable = mkEnableOption "blueman";
+    };
+  };
+
+  ###### implementation
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = [ pkgs.blueman ];
+
+    services.dbus.packages = [ pkgs.blueman ];
+
+    systemd.packages = [ pkgs.blueman ];
+  };
+}