rewrite codebase

[HyperCodec]

Massive changes to the codebase

[HyperCodec]

All the runtime things should be pretty much done, now I just need to add all the reproduction and mutation stuff.

[HyperCodec]

probably should get rid of all the impl AsRef<NeuronLocation> things, kind of annoying and not really that fast if it impleents Copy.

[HyperCodec]

All major features are implemented and I don't see any bugs rn, now it's time to polish and document.

[HyperCodec]

I think RandomlyMutable::mutate should actually consider the rate arg. Outer implementations in DivisionReproduction and CrossoverReproduction should then use MutationSettings.

[HyperCodec]

Forgot to add the MaxIndex trait, might just add it in a different PR because I'm close to merging this one.

[HyperCodec]

merged in #84