Add a "all-in-one" object for model and scene setup

[ldraw-org]

I'd love see a sort of all in one object for scene and model loading/manipulation. I've implemented something of that sort in the LDraw library software. It's not where I'd like it but my JavaScript is terrible. Feel free to borrow: https://github.com/ldraw-org/ldraworg-library/blob/main/public/assets/js/ldraworgscene.js Usage is here: https://github.com/ldraw-org/ldraworg-library/blob/main/public/assets/js/ldbi.js