Added printing and grdp modules

modules/printing/default.nix

@@ -0,0 +1,27 @@
+{
+  lib,
+  config,
+  ...
+}:
+
+with lib;
+let
+  cfg = config.modules.printing;
+in
+{
+  options.modules.printing = {
+    enable = mkEnableOption "printing";
+  };
+
+  config = mkIf cfg.enable {
+    services.printing = {
+      enable = true;
+      # drivers = with pkgs; [];
+    };
+    services.avahi = {
+      enable = true;
+      nssmdns4 = true;
+      openFirewall = true;
+    };
+  };
+}