add apps

modules/applications/nh/home.nix

@@ -0,0 +1,5 @@
+{ config, pkgs, ... }:
+{
+  home.packages = [ pkgs.nh ];
+  home.sessionVariables.NH_FLAKE = "${config.home.homeDirectory}/dotfiles";
+}

modules/applications/nh/nixos.nix

@@ -0,0 +1,12 @@
+{ primaryUser, ... }:
+{
+  programs.nh = {
+    enable = true;
+    flake = "/home/${primaryUser}/dotfiles";
+    clean = {
+      enable = true;
+      dates = "weekly";
+      extraArgs = "--keep-since 14d --keep 10";
+    };
+  };
+}