refactor(steam): migrate to options module

flakes/nixos.nix

@@ -93,8 +93,6 @@ in {
         ++ [
           ../modules/common.nix
           ../modules/containers.nix
-          ../modules/applications/libreoffice
-          ../modules/applications/steam
 
           ../machines/terra/configuration.nix
         ];

machines/terra/configuration.nix

@@ -49,6 +49,7 @@
 
   my.hyprland.enable = true;
   my.libreoffice.enable = true;
+  my.steam.enable = true;
 
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.michael = {

modules/applications/steam/default.nix

@@ -1,7 +0,0 @@
-{pkgs, ...}: {
-  programs.steam = {
-    enable = true;
-    package = pkgs.unstable.steam;
-    gamescopeSession.enable = true;
-  };
-}

nixos/steam/default.nix

@@ -0,0 +1,21 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}: let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.my.steam;
+in {
+  options.my.steam = {
+    enable = mkEnableOption "steam";
+  };
+
+  config = mkIf cfg.enable {
+    programs.steam = {
+      enable = true;
+      package = pkgs.unstable.steam;
+      gamescopeSession.enable = true;
+    };
+  };
+}