added nh

modules/cli/nh.nix

@@ -0,0 +1,16 @@
+{ pkgs, lib, config, callPackage, ... }:
+with lib; let
+  username = config.modules.other.system.username;
+  cfg = config.modules.programs.nh;
+in {
+  options.modules.programs.nh.enable = mkEnableOption "nh";
+
+  config = mkIf cfg.enable {
+      programs.nh = {
+          enable = true;
+          clean.enable = true;
+          clean.extraArgs = "--keep-since 4d --keep 3";
+          flake = "/home/vali/repos/nichts";
+      };
+  };
+}