Add all of iogamaster modules

modules/nixos/apps/steam/default.nix

@@ -0,0 +1,40 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib;
+with lib.frajul; let
+  cfg = config.apps.steam;
+in {
+  options.apps.steam = with types; {
+    enable = mkBoolOpt false "Enable or disable steam";
+  };
+
+  config = mkIf cfg.enable {
+    programs.steam.enable = true;
+    programs.steam.remotePlay.openFirewall = true;
+    programs.steam.gamescopeSession.enable = true;
+
+    environment.systemPackages = [
+      pkgs.steam
+      pkgs.mangohud
+      pkgs.protonup
+    ];
+
+    environment.sessionVariables = {
+      STEAM_EXTRA_COMPAT_TOOLS_PATHS = "/home/${config.user.name}/.steam/root/compatibilitytools.d";
+    };
+
+    programs.gamemode.enable = true;
+
+    home.persist.directories = [
+      ".local/share/Steam"
+      ".steam"
+
+      ".local/share/Terraria"
+    ];
+  };
+}