Add proton-ge and steam-play-none.

nodes/hosts/common/programs/steam.nix

@@ -10,6 +10,10 @@
       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
+      extraCompatPackages = [
+        pkgs.proton-ge-bin
+        pkgs.steam-play-none
+      ];
       package = pkgs.steam.override { # Fix Overwatch and other games showing wrong timezone in-game.
         extraProfile = ''
           unset TZ