Update drupal_cms_starter to use as a blank slate for building a site with XB
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3539914. -->
Reported by: [pameeela](https://www.drupal.org/user/1431110)
Related to !584
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Drupal CMS 2.0 will heavily use Experience Builder, and we need to adapt our starter recipe to integrate this. The main change is to install XB, and also ship a single XB page that is configured as the home page.</p>
<p>Theme-wise, it should use Mercury without any of the template-specific styles.</p>
issue