Induction sessions functionality

[naxxfish]

User story: As a inductor (super user), I want to be able to schedule induction sessions, invite people who wish to take the induction, and easily tick off people who have attended an induction, and optionally grant a permission to attendees who have completed the session successfully.

As a member (user), I want to be able to sign up for induction sessions in order to get access to the tools I wish to use

There are several components to this:

• Creating a type of induction (e.g. Laser Cutter, 3D Printer, Wood workshop), which (optionally) grants a permission on completion, possibly with prerequisite permissions (must have wood shop permission before being inducted on the lathe).
• Scheduling sessions of a particular type of induction (at a given time, location, with a particular inductor)
• Some method of potential inductees signing up to induction sessions (possibly through a waiting list mechanism)
• Some way of an inductor recording the results of a session (e.g. that inductees have attended and successfully completed), and thus granting permissions as appropriate.

This functionality and workflow should map to the current induction signup process for SLMS, which is being recorded on the SLMS discourse here, but should be general and flexible enough that it can map to alternative workflows which may be use in other similar organisations.