Reduce Staff Permissions

[naasanov]

Motivation

Staff should only be able to view data, with the exception of checking the "is registered" checkbox on the student table

Deliverables

• Add a role field to Session, User, and JWT in next-auth.d.ts
• In the staff view, conditionally render relevant components depending on whether the user is admin or staff
  • This includes
    • the Row Options column (edit and delete)
    • the Create New resource button
  • Use NextAuth's useSession hook to extract role information from the authentication context
• Add a button on the staff view that switches the current user between staff and admin for debugging

Important Notes

• There is no implemented NextAuth authentication, so no data is properly loaded into the session. You should find a temporary workaround for this that should be easily hotswappable once authentication is implemented