feat: add nfc module (and use it on 'astyanax')

home/modules/nfc/proxmark3.nix

@@ -0,0 +1,21 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.nfc.proxmark3;
+in
+{
+  options.nfc.proxmark3 = {
+    enable = lib.mkEnableOption "proxmark3 (iceman fork)";
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = [
+      pkgs.proxmark3
+    ];
+  };
+}