feat(spotlight): implement Fuse.js fuzzy search and action grouping with mock data

src/App.tsx

@@ -2,7 +2,12 @@ import { MantineProvider } from "@mantine/core";
 
 import "@mantine/core/styles.css";
 import "@mantine/spotlight/styles.css";
+import { SpotlightTestDemo } from "./SpotlightTestDemo";
 
 export default function App() {
-  return <MantineProvider></MantineProvider>;
+  return (
+    <MantineProvider>
+      <SpotlightTestDemo></SpotlightTestDemo>
+    </MantineProvider>
+  );
 }