Improved manual modifier generation

[Chillu1]

ModiBuff currently has basic manual modifier generation by feeding it with a generation func ManualModifierGenerator, and add data ModifierAddData, ideally we would allow for full control while guiding and helping as much as possible.

One improvement would be to automate the ModifierAddData process, without runtime performance loss, like reflection at Init.

A second improvement would be to open up the hidden interface logic, so the user doesn't have to look into ModiBuffs internal effect logic to figure out what needs to be fed.