SKUManager

This is an Editor script for managing SKUs inside Unity. It allows to create different SKUs for the same target build groups, changing compile time directives that would affect which code got compiled even for the same platform.

You need to change the values in the SKU enum, and how are they associated in the constructor. I've left a couple as examples.

It could be improved by allowing to edit the SKUs from the editor itself, instead of setting them in code.