Merged the full assimp integration into main

I really don’t have much to say here, I’ve already put all the info about the branch into the past devlogs. All the formats work and the wrapper is very sturdy. I’ve found more bugs in assimp itself than my code (devlog on that soon). So, rasterminal can now load basically any 3D model you throw at it. Some of the formats assimp supports are so niche, I’ve never even heard of them.