Add Text Field to Pickup Slots
Description
Pickup Slots should have a Text Field to describe them further, as decided and discussed here in the Produkt Team: https://beta.foodsharing.de/?page=poll&id=1590
There should be a destinct text per Pickup, but also the option to set a default for regular Slots.
Impact
In many Stores, not all Slots are equal. This would make it easy to distinguish.