fix: storybook with typescript (#2926)

* fix storybook for typescript

* fix babel

platform/ui/src/storybook/header/header.tsx

@@ -0,0 +1,8 @@
+import React from 'react';
+import Header from '../assets/header.png';
+
+export const WelcomeHeader = () => (
+  <div className="mb-8">
+    <img src={Header} alt="OHIF-v3 User Interface Library" />
+  </div>
+);