Experimenting with non-Euclidean geometry.

[finegeometer]

This is an experiment to see what it takes to implement a non-Euclidean game in Bevy.

It turned out I needed to make non-Euclidean versions of the bevy_transform, bevy_render, and bevy_pbr crates.

This use-case seems related to issue #1680, in that in both cases, the user wants to modify how the Transform type works.

I'd love it if it were as easy to make a non-Euclidean game as a Euclidean one. But we're nowhere near that.