Course Autopilot for Reset and Completion

On the admin dashboard, through a hidden screen like `/wp-admin/options.php` that site administrators (and support team) can use to test and validate behaviour and recreate exact states of the course experience:

- The ability to `complete` or `reset` the whole course.
- The ability to `complete` elements of a course.
- The ability to reset or `incomplete` elements of the course.
- The ability to `pass` or `fail` quizzes with particular grades.
- etc (will add as we progress)

Once it is tested to work well, this can be migrated into a user friendly UI into regular visible settings.