Improvement: Pet Display V2

[DavidArthurCole]

What

See #4083.
Completely overhauls the Current Pet Display, and makes it prettier and more customizable, combining the best parts of the other mods' pet displays into one solution.

Bugs

• Icons may be off-center (?)
• Icons look like garbage (low res)
• Icon spin does not work
• Pet item Z-layer rendering is broken (item renders "under" pet)
• Rarity background fades in inventory, other elements do not
• The "first time" cycling a pet with a skin, the skulls flicker to Alex/Steve skins before loading.

Changelog Improvements

• Completely overhauled current pet display. - Daveed.
  • Pet icon display ("SBE-style"), supports animated skins & spinning.
  • Pet text display ("NEU-style"), can be placed abstractly next to/above/below the icon.
  • Each aspect of the pet display is toggleable and very configurable.