Commit b59840b5930 for nodejs

commit b59840b593060534a9b508020d9ca01a7163e471
Author: James M Snell <jasnell@gmail.com>
Date:   Mon Sep 28 06:22:57 2026 +0200

    buffer: add isLatin1

    Implements a fast check to determine if a string is
    a valid byte string (only chars <= 0xff).

    Signed-off-by: James M Snell <jasnell@gmail.com>
    PR-URL: https://github.com/nodejs/node/pull/66298
    Reviewed-By: René <contact.9a5d6388@renegade334.me.uk>
    Reviewed-By: Filip Skokan <panva.ip@gmail.com>
    Reviewed-By: Anna Henningsen <anna@addaleax.net>
    Reviewed-By: Robert Nagy <ronagy@icloud.com>