fix: improve gaming module

modules/gaming/default.nix

@@ -1,12 +1,50 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
 {
   nixpkgs.allowedUnfree = [
     "steam"
     "steam-unwrapped"
+    "lutris"
   ];
 
+  hardware.graphics = {
+    enable32Bit = true;
+    extraPackages = with pkgs; [
+      dxvk
+      vkd3d-proton
+    ];
+  };
+
   programs.steam = {
     enable = true;
     remotePlay.openFirewall = false;
     dedicatedServer.openFirewall = false;
   };
+
+  programs.gamemode.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    lutris
+    mangohud
+  ];
+
+  home-manager.users.${config.host.username} = {
+    xdg.configFile."lutris/system.yml".text = lib.generators.toJSON { } {
+      system.game_path = "/home/${config.host.username}/games";
+    };
+  };
+
+  security.pam.loginLimits = [
+    {
+      domain = config.host.username;
+      type = "hard";
+      item = "nofile";
+      value = "524288";
+    }
+  ];
 }