add Tooltip example

Author: gioboa

apps/qwik-demo-app/src/routes/Tooltip/BasicTooltip/index.tsx

@@ -0,0 +1,10 @@
+import { component$ } from '@builder.io/qwik';
+import { SfTooltip } from 'qwik-storefront-ui';
+
+export default component$(() => {
+  return (
+    <SfTooltip label="This is a tooltip!">
+      <span>Hover me!</span>
+    </SfTooltip>
+  );
+});