Add "animations" command

[CreepaTate]

I can't label this as a suggestion, but this is one. I think an "anim" command should be added to the console, and it would load a METAL Composer animation. There would be multiple commands, of course.

• loadanim - Loads an animation from a .json file (anims)
• loopanim - Loops a loaded animation.
• playanim - Plays a loaded animation once.
• saveanim(?) - Saves an animation to a .json file (anims)