meta: reorganize nix-os and hosts to single directory nixos

nixos/modules/gnupg.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+{
+  config = {
+    # Use pcscd for smartcard support
+    services.pcscd.enable = true;
+
+    programs.gnupg = {
+      package = pkgs.gnupg.overrideAttrs (superAttrs: {
+        configureFlags = superAttrs.configureFlags or []
+          ++ [ "--disable-ccid-driver" ];
+      });
+      agent = {
+        enable = true;
+        pinentryPackage = pkgs.pinentry-qt;
+      };
+    };
+  };
+}