add idle indicator to waybar config

home/waybar.nix

@@ -130,6 +130,19 @@ SSID: {essid} {frequency}'';
         background = theme.normal.black;
         color = theme.normal.white;
       }
+      {
+        name = "idle_inhibitor";
+        config = {
+          spacing = 10;
+          format = "{icon}";
+          format-icons = {
+            activated = "";
+            deactivated = "";
+          };
+        };
+        background = theme.normal.white;
+        color = theme.normal.black;
+      }
       {
         name = "tray";
         config = { spacing = 10; };