Create enum for User roles

[edalholt]

Change memberships.type in IUserProfileResponse from string to enum:

Something like this

export enum userRole { "leader" = "Leader", "deputy_leader" = "Deputy Leader", "cashier" = "Cashier", "board_member" = "Board Member", "deputy_board_member" = "Deputy Board Member", "volunteer" = "Volunteer", "member" = "Member", }