Improves Slimes and make them configurable.

Slimes can now merge and split, and have been visually upgraded.

All new gameplay and visual behavior can be configured.

Changes:

• Slime animations are now smooth, no longer stutter during gameplay.
• Added an additional squish animation to anticipates Slimes jumping.
• Added pixel-consistent textures based on the Slime's size up to size 4.
• Added a new spawning animation.
• Added a splitting animation, coupled with a new sound.
• Particles are emitted when splitting
• Shadows now properly scale based on the Slime's "squish" animation.
• Slimes can now merge with one another.
• Magma Cubes use an entirely unique set of sounds.

Config:

• Requires FrozenLib, Cloth Config and Mod Menu to configure in-game