add veracrypt executable

modules/veracrypt.nix

@@ -0,0 +1,14 @@
+{ config, lib, pkgs, ... }:
+
+{
+  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) 
+  [
+    "veracrypt"
+  ];
+
+
+
+  environment.systemPackages = [
+    pkgs.veracrypt
+  ];
+}