bug: Example can not be used outside of crate

[GordianDziwis]

• I have looked for existing issues (including closed) about this

Bug Report

This example can't be used outside of rig, because stream_to_stdout is not public. Also, the StreamingResult type is not public, so I can not find a way to stream prompt results.

[linear]

RIG-1109

[joshua-mo-143]

I'll take a look at this! Thanks for opening this issue @GordianDziwis