New Entity Prototype: The Catamount

This is a neutral mob that can be tamed by feeding it raw meat or fish. Once tamed, it can be ridden (it uses the vanilla horse/donkey functionality) and can be healed/bred with raw or cooked meat or fish. Like the tamed wolf, it will attack any entity which damages its owner, and like the vanilla cat, it scares away creepers. Catamounts do not take fall damage, meaning they can jump from any height.

Wild Catamounts hunt goats. All variants reuse the cat sound effects, but at a lower pitch. When angry, they growl, using the wolf growl sound.

This entity now spawns naturally in mountainous biomes.

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Fun Fact: I chose the name "Catamount" for the rideable cat entity since it looks like a portmanteu word combining "cat" and "mount," but it is actually an alternate name for the mountain lion or puma: https://en.wiktionary.org/wiki/catamount. While the real animal isn't horse-sized and would definitely object to being ridden, it does meow and purr, just like a regular cat! Its light brown fur is the inspiration for the Minecraft entity's texture.

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(This is still a work in progress!)

TODOs:

- Fix jerky walking animation Done
- Add attack animation
- Add more texture detail Done
- Implement spawn rules Done
- Baby version should not be rideable Done
- Add lead anchor point Done

- Should be able to sit, like cat & wolf [?]
- Different textures for different biomes?
- Should purr when fed?

Any suggestions for additions or improvements are welcome!