[Feature] Different types of users for dev mode

[liviopersonne]

Is your feature request related to a problem? Please describe.

Right now, the dev mode menu only applies to admins:

if (!viewerAdmin) {
        return;
    }

It's the only type of role we have right now, but if we create other roles like student or client, we'll need to adapt the dev mode to support them.

Describe the solution you'd like

A dev mode that adapts to the user's role (admin, student, client...)