feat: add widget for gpu and cpu profile

widgets/bar/gpu.tsx

@@ -0,0 +1,11 @@
+import { bind, Variable } from "astal";
+
+export const GPU = () => {
+  const gpu = Variable("").poll(5000, ["bash", "-c", "supergfxctl -g"]);
+
+  return (
+    <box cssClasses={["pill"]}>
+      <label label={bind(gpu).as((val) => `GPU: ${val}`)} />
+    </box>
+  );
+};