The ~Accessor~ library makes it nicer to work with nested functional data
structures.

An accessor is a value that understands how to reach data within a
larger data structure, independently from what you intend to do with
it. Accessors allow you to read and write data and perform
possibly-monadic traversals. By composing accessors, you can work with
increasingly complex data structures.

In case you have ever heard of "lenses", this is an OCaml
implementation of that idea.

See the [[./doc/tutorial.mdx][tutorial]] for more information.