Implement voucher per event and for all events of an organizer

[mariobehling]

eventyay-common: The ticket system already has a voucher system for tickets of an event. Implement the same kind of functionality a) for a voucher per event and b) for all events of an organizer in the admin area of the platform.

[odkhang]

Hi @mariobehling,
So in Eventyay-common, we will implement 2 things:

1. Event Detail: add another tab call 'Voucher', allow organizer to set voucher similar in ticket component, apply to specific Event
2. Organizer Setting: add another tab call 'Voucher', allow organizer to set voucher similar in ticket component, all to All Event of this Organizer.
3. If Voucher is set on both Organizer and Event level, Attendee will able to use all voucher

[mariobehling]

@odkhang You misunderstand. Vouchers for events are set by admins. Please first implement other admin features.