add web demo

apps/web/lib/hooks/use-local-storage.ts

@@ -0,0 +1,27 @@
+import { useEffect, useState } from "react";
+
+const useLocalStorage = <T>(
+  key: string,
+  initialValue: T,
+  // eslint-disable-next-line no-unused-vars
+): [T, (value: T) => void] => {
+  const [storedValue, setStoredValue] = useState(initialValue);
+
+  useEffect(() => {
+    // Retrieve from localStorage
+    const item = window.localStorage.getItem(key);
+    if (item) {
+      setStoredValue(JSON.parse(item));
+    }
+  }, [key]);
+
+  const setValue = (value: T) => {
+    // Save state
+    setStoredValue(value);
+    // Save to localStorage
+    window.localStorage.setItem(key, JSON.stringify(value));
+  };
+  return [storedValue, setValue];
+};
+
+export default useLocalStorage;