Allow user to specifiy additional wild->domesticated pairs

[DavGam]

Is your feature request related to a problem? Please describe.
The system you've developed to allow wild forms to be bred and domesticated is brilliant, but feels out of place when other animal based mods are installed.

Describe the solution you'd like
Allow the user to assign new pairs to the domestication config.

Additional context
Alex's Mobs, for example, adds an elephant that could be domesticated from the woolly mammoth. Similarly, Unnamed Animal Mod includes a musk ox that would suit being domesticated into the vanilla cow.