Add member study status (1/2/3/+ years, BSc, doing master thesis)

[07joshua03]

Add a property for members to save study status. Members should be able to share their study status, which should be a multiple choice option. There should also be a boolean property for allowing contact about {study-status}.

The goal of this would be for students to receive information, promotion or possibilities (career of study related) and companies should be able to target specific students based on their status.

This can simply not be derived from the starting year and current study programme. By adding these properties, we could improve both the interest of students in this contact and provide more specific options for companies, thereby potentially improving engagement.

Export should be able to filter based on this status and allowing of contact.