This fixes out-of-date information that is no longer true, and makes the
up-to-date information more accessible.
(cherry picked from commit c5fa5e503a)
This is a big step documenting the store layer on its own, separately from the evaluator (and `builtins.derivation`).
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
