Fully merged and done with Kitty

Finally completed the kitty protocol implementation. It is kinda slow, since the resolution is so much bigger, so I will try to optimize the high-res performance even more. So now the next two big milestones are:

• Add Sixel on top of kitty, that’ll be a lot of work

• Optimize the rasterizer even more

I was thinking of maybe adding gpu rendering as an option for super large meshes or high-res scenarios, but idk. I’ll definetly keep the pure cpu renderer for computers without gpus, but I’m not sure about a gpu implementation. It would be hard to do, less portable and it might not even work that well.