Working on adding supersampling anti-aliasing

Still a work in progress and I might not merge it into main, because it’s a lot of work for not that much benefit.
I have to catch a lot of bad_allocs and things like that for super large SSAA sizes, which is really annoying and can affect performance.
SSAA works by rendering at a higher resolution and then downscaling for better edges (makes edges smooth and fade-in instead of jagged)
Picture with 2x SSAA and without SSAA: