Keith: Add NAPS2 for scanning

modules/programs/naps2.nix

@@ -0,0 +1,10 @@
+{ self, ... }: {
+  flake.modules.nixos.naps2 = { pkgs, ... }: {
+    imports = with self.modules.nixos; [
+      sane
+    ];
+    environment.systemPackages = with pkgs; [
+      naps2
+    ];
+  };
+}