tools,doc: forbid CJS globals in ESM code snippets

PR-URL: https://github.com/nodejs/node/pull/38889


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Danielle Adams <adamzdanielle@gmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>