Legacy models to add

[IcarussOne]

Related to the legacy big cat models and legacy shark model config options, old horses will not be included due to vanilla horses already using the newer Mo' Creatures horse models.

Mobs to still include:

• [ ] Bears
• [ ] Boars
• [ ] Jellyfish (as an extra variant)
• [ ] Ogres (+ an option for earlier textures)
• [ ] Werewolves
• [ ] Wild Wolves