MGE Slime-carrier, Dark-matter and Barometz

Another full remake, this time with the Barometz included too. I'll train a Pony version if there's demand. See the new taglist for detailed tags.

Changelog:

• Mostly new dataset with more consistent slime textures, including a few manual edits to reference certain features. (84 images)

• Added the barometz

• Added a lot of new tags (See taglist for details)

• Updated syntax to match my main MGE model for compatibility with some common/well-suited features, like tails or automaton joints (will probably post some more examples soon)