doc: add ESM doc to _toc.md and all.md

PR-URL: https://github.com/nodejs/node/pull/15248


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>