Kobold monkey issues

[UbaserB]

Description

As the creator of monkey kobolds, there were a bunch of issues in my PR that need fixing sometime that I personally couldn't figure out how to do. The list is as follows:

• [ ] Improve the base sprite of the kobold. Even though i tried my best, it is kind of ugly right now.
• [X] Should have multiple colour variants kind of like the way butterflies are.
• [X] The unique identifier should be KB for kobolds instead of MK like monkeys.
• [ ] Their in-hand sprite for holding items is messed up and it should be a simple fix thinking about it.
• [X] The accent should be something along the lines of "hiss" instead of "ook ook", perhaps implement a custom language?
• [ ] It would be neat to implement custom voice sounds instead of standard lizard people since it feels a bit deep and low-pitch for my image of them.
• [X] Kobold cube boxes should have a custom sprite.
• [ ] Full compatibility with monkey clothes (the tail clips poorly for example).

[Errant-4]

The kobold cubes should also have at the very least their own cube sprite with a K instead of an M, if not something more different