style: change cursor to pointer on hover

widgets/bar/launcher.tsx

@@ -1,11 +1,13 @@
 import { App } from "astal/gtk4";
 import { WINDOW_NAME } from "../app-launcher";
+import { Gdk } from "astal/gtk4";
 
 export const Launcher = () => {
   return (
     <button
       cssClasses={["pill", "launcher"]}
       onClicked={() => App.toggle_window(WINDOW_NAME)}
+      cursor={Gdk.Cursor.new_from_name("pointer", null)}
     >
       <image iconName="nix-symbolic" />
     </button>