rustdoc: nodemap doc refreshing
Not pretending to be comprehensive.
- correcting some inconsistencies
- adding a few missing doc-comments
- adding more cross references (in some cases it's right beside
the current documentation item, but it will nevertheless also
be useful, because `rustdoc` will warn us if inconsistencies
arise).
This directory is meant to cache artifacts useful for tests (such as bundle).
Those artifacts need to be cached because they are slow to regenerate on each
test but too large to be tracked within the repository. They are not expected
to change between each run and can be cached.
The `./scripts/` contains code to generate the artifact while the `cache`
directory contains resulting artifact.