add an extra README.md for npm

Author: gioboa

packages/qwik-storefront-ui/README.md

@@ -0,0 +1,13 @@
+<p align="center">
+  <img src="https://raw.githubusercontent.com/BuilderIO/qwik/main/.github/assets/qwik-logo.svg" alt="Qwik" width="320" />
+</p>
+
+<p align="center">
+  <img src="https://user-images.githubusercontent.com/1626923/157498695-885de6c5-deba-416d-8287-51e7269aef56.png" alt="Storefront UI" width="400" />
+</p>
+
+<h3 align="center">
+  Qwik UI library and Design System for eCommerce based on <a href="https://tailwindcss.com/">TailwindCSS</a>.
+</h3>
+
+<img src="https://github.com/vuestorefront/storefront-ui/raw/v2-develop/_readme/showcase.png" alt="showcase">