Gaming/retroarch: sync retroarch folder with syncthing

roles/gaming/programs/retroarch.nix

@@ -42,5 +42,28 @@ in
         };
       };
     };
+    # Add a syncthing ignore file to the retroarch folder
+    xdg.configFile."retroarch-stignore" = {
+      target = "retroarch/.stignore";
+      text = ''
+        !saves
+        !states
+        !database
+        !playlists
+
+        // Ignore everything except stuff above
+        *
+      '';
+    };
+  };
+
+  # Sync saves and some other stuff
+  services.syncthing.settings.folders = {
+    "retroarch" = {
+      label = "RetroArch";
+      id = "jxuou-2yjnu";
+      devices = [ "steamdeck" "pc" ];
+      path = "~/.config/retroarch";
+    };
   };
 }