Refactor back to a more modular configuration

modules/home-manager/cli/node.nix

@@ -0,0 +1,25 @@
+{ config, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.homeManagerModules.cli.node;
+
+  inherit (config.xdg) configHome dataHome stateHome;
+in
+{
+  options.homeManagerModules.cli.node.enable = mkEnableOption "Enable node";
+
+  config = mkIf cfg.enable {
+    xdg.configFile."${config.home.sessionVariables.NPM_CONFIG_USERCONFIG}".text = ''
+      cache=${configHome}/npm
+      init-module=${configHome}/npm/config/npm-init.js
+      logs-dir=${stateHome}/npm/logs
+      prefix=${dataHome}/npm
+    '';
+
+    home.sessionVariables = {
+      NPM_CONFIG_USERCONFIG = "${configHome}/npm/npmrc";
+    };
+  };
+}