Add a database and events

[fulldecent]

The High Five module will include a simple database:

• high_five
  • id
  • created_at timestamp
  • updated_at timestamp
  • user_id link to users table
  • course_id link to courses table (NULL)

And a new event for high_five_event.

This requires the XML file, and a migration.

Work plan

• [ ] Research and document other modules that have a database component
  • [ ] https://github.com/danmarsden/moodle-mod_attendance/tree/MOODLE_404_STABLE/db
  • [ ] https://github.com/sebsoftnl/moodle-block_coupon/tree/main/db
  • [ ] Moodle plugin documentation
• [ ] Identify any requirements above that contradict best practice and document it (such as using a timestamp column, calling the column "created_at", etc.
• [ ] Implement the .xml and migration for database
• [ ] Implement the event
• [ ] Create /logal/high_five/do-high-five.php which is a REST POST route, requires authentication and records a high five
• [ ] Create a new administration page /local/high_five/index.html which requires the admin to login and it shows the latest high five in the database, and allows to create a high five (user_id = logged in admin user) and which triggers the high five event (clicking the button uses javascript REST API to do the high five without leaving the page)
• [ ] Update our documentation README to show a screenshot of the admin, document the fetaure
• [ ] Update README to cite all best practice documentation and related notes