refactor: make the whole thing more generic

modules/home-manager/desktops/hyprland/ags/js/misc/BatteryIcon.js

@@ -0,0 +1,14 @@
+import Widget from "resource:///com/github/Aylur/ags/widget.js";
+import Battery from "resource:///com/github/Aylur/ags/service/battery.js";
+
+export default () =>
+  Widget.Icon({
+    class_name: "battery",
+    icon: Battery.bind("icon_name"),
+    setup: (icon) =>
+      icon.hook(Battery, () => {
+        icon.toggleClassName("charging", Battery.charging);
+        icon.toggleClassName("charged", Battery.charged);
+        icon.toggleClassName("low", Battery.percent < 30);
+      }),
+  });