games: Optimize configuration

modules/nixos/multimedia/games/steam.nix

@@ -0,0 +1,26 @@
+{ pkgs, username, ... }:
+
+{
+  programs.steam = {
+    enable = true;
+    gamescopeSession.enable = true;
+  };
+  
+  environment.systemPackages = with pkgs; [
+    protonup-qt
+    protontricks
+  ];
+
+  # Sometimes a Steam game that runs natively on Linux
+  # creates a folder somewhere in ~/.local/share or ~/.config
+  # and in the usual case you would have to persist each game
+  # folder individually but since we set the nix home to this
+  # directory instead of the actual home directory, it all gets
+  # stored in here and by persisting the entire path this becomes
+  # a none issue.
+  environment.persistence."/nix/persist" = {
+    users."${username}".directories = [
+      ".local/share/steam_home"
+    ];
+  };
+}