feat(modules): new steam module

hosts/polymita-picta.nix

@@ -8,6 +8,7 @@
     inputs.self.nixosModules.homeManagerConfig
     inputs.jovian-nixos.nixosModules.default
     ../hardware/steam-deck.nix
+    ../modules/steam.nix
   ];
   config = {
     boot.loader.systemd-boot.enable = true;
@@ -83,11 +84,10 @@
 
     programs.steam = {
       enable = true;
-      package = pkgs.steam.override {
-        extraPkgs = p: [p.flatpak];
-      };
+      extraPkgs = [pkgs.flatpak];
       remotePlay.openFirewall = true;
     };
+
     jovian.devices.steamdeck.enable = true;
     jovian.devices.steamdeck.autoUpdate = true;
     jovian.devices.steamdeck.enableGyroDsuService = true;

modules/steam.nix

@@ -0,0 +1,20 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}: let
+  cfg = config.programs.steam;
+in {
+  options.programs.steam.extraPkgs = with lib;
+    mkOption {
+      type = types.listOf types.package;
+      default = [];
+    };
+
+  config = lib.mkIf cfg.enable {
+    programs.steam.package = pkgs.steam.override {
+      extraPkgs = _: cfg.extraPkgs;
+    };
+  };
+}