DA Live Preview

Add live preview support for Document Authoring for customers who use the new Commerce Scaffold CLI.

## Note:
If there is no query param, the script will not be imported. Either way, this runs after loadPage and does not impact performance.

Before: https://main--aem-boilerplate-commerce--hlxsites.hlx.page/

After: https://da-live-preview--aem-boilerplate-commerce--hlxsites.hlx.page/

scripts/scripts.js

@@ -328,3 +328,9 @@ async function loadPage() {
 }
 
 loadPage();
+
+(async function loadDa() {
+  if (!new URL(window.location.href).searchParams.get('dapreview')) return;
+  // eslint-disable-next-line import/no-unresolved
+  import('https://da.live/scripts/dapreview.js').then(({ default: daPreview }) => daPreview(loadPage));
+}());