adding list group from bootstrap

src/components/ListGroup.tsx

@@ -1,5 +1,13 @@
-function ListGroup(){
-    return <h1>List Group</h1>;
+function ListGroup() {
+  return (
+    <ul className="list-group">
+      <li className="list-group-item">An item</li>
+      <li className="list-group-item">A second item</li>
+      <li className="list-group-item">A third item</li>
+      <li className="list-group-item">A fourth item</li>
+      <li className="list-group-item">And a fifth one</li>
+    </ul>
+  );
 }
 
-export default ListGroup;
+export default ListGroup;