Julia v1.11-rc1: Iterators.Stateful docstrings suggest it is an internal binding

[RoyCCWang]

My REPL shows the following before the usual docstring for Iterators.Stateful:

help?> Iterators.Stateful
  │ Warning
  │
  │  The following bindings may be internal; they may change or be removed in future versions:
  │
  │    •  Base.Iterators.Stateful

On Julia v1.10.4, I do not get this warning when viewing the docstring for Iterators.Stateful.

I see a few open issues involving stateful iterators, and proposals for an IsStateful trait in #43388.

Please advise the Julia community in the v1.11 release notes if Iterators.Stateful ends up being deprecated in the official v1.11 release. I suggest having some compact examples of what not to do when using Iterators.Stateful, either in its docstring or via a blog post on the Julia official website.

[nsajko]

See #51335