chore: refactor system modules

system/packages/steam.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+with lib; let
+  cfg = config.system.programs.steam;
+in {
+  options.system.programs.steam.enable = mkEnableOption "Enables Steam and Steam hardware";
+  config = mkIf cfg.enable {
+    programs = {
+      steam = {
+        inherit (cfg) enable;
+        protontricks.enable = true;
+        remotePlay.openFirewall = true;
+        localNetworkGameTransfers.openFirewall = true;
+        gamescopeSession.enable = true;
+        extraCompatPackages = [pkgs.proton-ge-bin];
+      };
+      gamescope = {
+        enable = true;
+        capSysNice = true;
+        args = [
+          "--rt"
+          "--expose-wayland"
+        ];
+      };
+    };
+    hardware.steam-hardware = {
+      inherit (cfg) enable;
+    };
+  };
+}