Restructure repo

modules/nixos/users.nix

@@ -0,0 +1,19 @@
+# Users configuration for NixOS
+{
+  config,
+  pkgs,
+  ...
+}: let
+  username = config.var.username;
+in {
+  programs.zsh.enable = true;
+  users = {
+    defaultUserShell = pkgs.zsh;
+
+    users.${username} = {
+      isNormalUser = true;
+      description = "${username} account";
+      extraGroups = ["networkmanager" "wheel"];
+    };
+  };
+}