docs: types need reference documentation

[jalehman]

There are many types introduced in neo that are either new or just heavily used: kook, curb, stud, kids, dare, lads, pish, lash, form, pail, note to name a few. There should be reference documentation for these in one place.

[tiller-tolbus]

There are some arms in sur/neo related to axals in the +of core that would be very helpful to document for purposes of writing renderers like Sky and Tree

[bonbud-macryg]

@tiller-tolbus Yeah I've scanned /sur/neo again and I'm thinking there's a lot of functionality in there that should be covered in a separate document. Maybe one doc for +of and one for using the shanes.

[bonbud-macryg]

@liam-fitzgerald When you're back could you go through types.txt in #80 and leave comments on my questions in there? If you CMD+F ??? or [ that should get all of them. Once we've filled those out the doc should cover 1) all of the types shrub devs have to think about outside of +of and shanes and 2) the types that those types are made up of.

[bonbud-macryg]

Would be nice to have anchor links in docs like this but Sky doesn't support it rn.