feat(devenv): add enable option

home/modules/devenv/default.nix

@@ -1,4 +1,19 @@
-{ pkgs, ... }:
 {
-  home.packages = [ pkgs.devenv ];
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.devenv;
+in
+{
+  options.devenv = {
+    enable = lib.mkEnableOption "devenv";
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = [ pkgs.devenv ];
+  };
 }