Convert Starshot Container component to SDC

Use the new merge request guide:

https://www.drupal.org/community-initiatives/starshot-demo-design-system... →

Marking postponed until the script changes have been reviewed 📌 Create automated script for converting components to SDC Fixed .

Closing because we'll do the YAML updates here:

📌 Use SDC conversion script to create baseline SDC YAML and README files Fixed