add steam

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

users/alice/systems/artemision/steam.nix

@@ -0,0 +1,16 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+    localNetworkGameTransfers.openFirewall = true;
+    extraCompatPackages = with pkgs; [ proton-ge-bin ];
+    extest.enable = true;
+  };
+}