Demo Experience Builder button on project landing page

Thank you for spinning this issue out from 📌 Add Tugboat integration RTBC .

Ideally, this sort of thing would be integrated into d.o itself

Can you open an issue in https://www.drupal.org/project/infrastructure → explaining what would be needed from d.o. to best support this (or if that's still unknown, then however much you do currently know about that)? There's also https://www.drupal.org/project/drupalci → and its subprojects but I think that's not the relevant issue queue for stuff related to GitLabCI or that sits outside of both DrupalCI and GitLabCI, so I think https://www.drupal.org/project/infrastructure → would be the right place for d.o. stuff needed to support more stuff related to Tugboat.

IMO it would be nice to have the button on the project page until it's available more broadly.

Though maybe we need to sort this one first?

📌 Should we add SDDS to XB's Tugboat? Needs work

That issue is fixed now