Readline shortcuts

[danobi]

Sweet tool! I was playing around a bit and I was really missing the standard readline shortcuts.

Is your feature request related to a problem? Please describe.

I don't really know sql that well so I was messing around with some queries. But it got annoying to need to copy paste and then left arrow / right arrow to edit the statements. I was wishing it was possible to up-arrow to get previous history.

Describe the solution you'd like

Would be nice if GQL could support standard readline shortcuts. If it were up to me (big caveat), I would use rustyline: https://github.com/kkawakam/rustyline. I've used it in the past for https://github.com/danobi/btrd and it worked quite well.

I wouldn't mind sending a PR for this if you think it's ok.

Describe alternatives you've considered Could do custom readline implementation in the cli crate.

Additional context N/A