Follow up for #1809352: Write tour.module and add it to core
Problem/Motivation
The original issue added the infrastructure for being able to add tours, and an example that shows in views edit. Another tour is needed to show basic things about drupal, like using Extend to add modules.
Proposed resolution
Add a tour for the front page, add a link to the front page tour to the main help page.
Remaining tasks
TBD.
User interface changes
Yes, adding a tour to the ui.
API changes
No api changes anticipated.