feat(nixos/hosts/WhiteRaven/models/vpn.nix, nixos/hosts/WhiteRaven/configuration.nix, flake.nix): Install Vpn

flake.nix

@@ -52,6 +52,10 @@
             inherit system;
             config.allowUnfree = true;
           };
+          pkgs-unstable = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+          };
           inherit inputs system;
         };
         modules = [