Add nut and upsmon

modules/services/nut.nix

@@ -0,0 +1,12 @@
+{
+  config.flake.factory.nut-client = config: {
+    power.ups = {
+      enable = true;
+      mode = "netclient";
+      upsmon = {
+        enable = true;
+        monitor = config;
+      };
+    };
+  };
+}