inpainting to stitch levels together

[schrum2]

We should be able to take two level scenes and combine them, with the diffusion model finding a suitable way to stitch them together. I'm not sure how hard it will be. However, there is flexibility given that the diffusion model can generate scenes of any size.

[schrum2]

Also, this has some connections to things I was trying to do in issue #28 , so let's talk about that at some point.

[schrum2]

This could still be interesting, but should now be considered very low priority because it turns out we can generate long levels just by setting a high width parameter at inference.

[schrum2]

It turns out the the long levels are often unbeatable, so finding a way to stitch together known good level scenes is now a bigger priority, and would actually create levels with more variety anyway.