move steam to shared module

modules/nixos/steam/default.nix

@@ -0,0 +1,75 @@
+{
+  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
+  # as well as the libraries available from your flake's inputs.
+  lib, 
+  # An instance of `pkgs` with your overlays and packages applied is also available.
+  pkgs, 
+  # You also have access to your flake's inputs.
+  inputs, 
+  # Additional metadata is provided by Snowfall Lib.
+  # The namespace used for your flake, defaulting to "internal" if not set.
+  namespace, 
+  # The system architecture for this host (eg. `x86_64-linux`).
+  system, 
+  # The Snowfall Lib target for this system (eg. `x86_64-iso`).
+  target, 
+  # A normalized name for the system target (eg. `iso`).
+  format, 
+  # A boolean to determine whether this system is a virtual target using nixos-generators.
+  virtual, 
+  # An attribute map of your defined hosts.
+  systems, 
+  # All other arguments come from the system system.
+  config
+, ...
+}:{
+  config = {
+    # programs.gamescope = {
+    #   enable = true;
+    #   capSysNice = true;
+    # };
+    programs.steam = {
+      enable = true;
+      remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
+      dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
+      localNetworkGameTransfers.openFirewall = true; # Open ports in the firewall for Steam Local Network Game Transfers
+
+    #   gamescopeSession = {
+    #     enable = true;
+    #     env = {
+    #       WLR_RENDERER = "vulkan";
+    #       DXVK_HDR = "0 ";
+    #       ENABLE_GAMESCOPE_WSI = "0";
+    #       WINE_FULLSCREEN_FSR = "1";
+    #       # Games allegedly prefer X11
+    #       SDL_VIDEODRIVER = "x11";
+    #     };
+    #     args = [
+    #       "--xwayland-count 1"
+    #       "--expose-wayland"
+
+    #       "-e" # Enable steam integration
+    #       "--steam"
+
+    #       # "--adaptive-sync"
+    #       # "--hdr-enabled"
+    #       # "--hdr-itm-enable"
+
+    #       # External monitor
+    #       "--prefer-output DP-3"
+    #       "--output-width 1920"
+    #       "--output-height 1080"
+    #       "-r 172"
+
+    #       # Laptop display
+    #       # "--prefer-output eDP-1"
+    #       # "--output-width 2560"
+    #       # "--output-height 1600"
+    #       # "-r 120"
+          
+    #       # "--prefer-vk-device 10de:1b81" # lspci -nn | grep VGA
+    #     ];
+    #   };
+    };
+  };
+}