Add typing for search result state hook value

fe/src/App.tsx

@@ -7,7 +7,7 @@ import './App.css'
 
 function App() {
   const [searchString, setSearchString] = useState("");
-  const [searchResults, setSearchResults]  = useState([]);
+  const [searchResults, setSearchResults] = useState<{}[]>([]);
   const [itemChoiceByUser, setItemChoiceByUser]  = useState({});
   const [count, setCount] = useState(0)