added system to dirs

modules/system/syncthing/default.nix

@@ -0,0 +1,21 @@
+{ pkgs, config, lib, ... }:
+
+let
+  cfg = config.system.syncthing;
+in
+{
+  options.system.syncthing = {
+    enable = lib.mkEnableOption "enables syncthing";
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.syncthing = {
+      enable = true;
+#      user = "blake";
+#      group = "blake";
+#      dataDir = "/var/lib/syncthing";
+      guiAddress = "0.0.0.0:2222";
+#      openDefaultPorts = true;
+    };
+  };
+}