first go at a ghci replacement

[yaxu]

No description provided.

[sorki]

To replicate ghci experience we can possibly use repline (or haskeline) to give users fully featured prompt with custom commands, multi-line editing, history..

[yaxu]

@sorki That's a nice idea. I was thinking of this as a drop-in replacement for editor plugins to use. But making a usable proper REPL that takes proper advantage of the commandline interface could be really nice.

[yaxu]

Going to merge this for now, as we're moving this inside the main tidal repo.