Introspection: Declare INPUT_TYPE and OUTPUT_TYPE nearly everywhere
Slice and lists are not done yet, it should be the focus of a specific MR (non-trivial support of the bytes special case)
Change author field to authors list in book.toml
i don't know anything about mdbook beyond the error in ci and the example at https://rust-lang.github.io/mdBook/format/configuration/general.html#general-metadata