[Enhancement] Adding Defense_VANILLA_GENERIC

[MaksyKun]

Is your feature request related to a problem? Please describe.
The problem Im facing is the full customized combat system which manipulates "armor"-behaviour as defense types in total. I haven't found a way to disable this and use default armor attributes.

Describe the solution you'd like
Therefore, my idea is to implement DEFENSE_VANILLA_GENERIC as a defense type equal to the vanilla generic damage type.

Describe alternatives you've considered
My alternative would have been to use the physical defense type as armor attribute, but this is tricky and inconsistent with our existent vanilla items which have simple modified attributes.

Additional context
In case anyone wants to implement it, feel free. Otherwise I'd give it a try on myself. You can assign me if needed.