Move OhMyREPL into Stdlib?

[malmaud]

As discussed on the Slack, it's worth thinking about having OhMyREPL ship with Julia and load automatically when an interactive Julia REPL is started. Then everyone gets a nice colorful experience!

[JeffBezanson]

Moving the rest of the REPL code to the stdlib would be a good start.

[ViralBShah]

Maybe replace the repl with OhMyRepl at the same time while moving to stdlib?

[StefanKarpinski]

It would be nice to have syntax highlighting in the default REPL, but this is definitely future work. Having CSTParser in the stdlib would make a lot of sense since it's so tightly coupled with the language. Even better would be using it for parsing in Julia itself, but I'm not sure that's going to happen.

[KristofferC]

I'm working on moving the REPL to stdlib.

As for OhMyREPL, the code in it is not pretty and it works quite well as a package for now. There is probably better stuff to spend time on for 1.0. But for the future, bringing in syntax highlighting in the REPL would be nice.

[felixcremer]

I think that was closed by #59778 and all the other work on the REPL recently.