P3049 R1 node-handles for lists

[wg21bot]

P3049R0 node-handles for lists (Michael Florian Hava)

[ednolan]

A feedback round was started on the mailing list on June 10, 2024.
https://lists.isocpp.org/lib-ext/2024/06/27449.php

[wg21bot]

P3049R1 node-handles for lists (Michael Florian Hava)