Better editor for REPL

[meain]

Right now REPL needs double enter to continue. We should be able to hook into shift+enter for new line instead of this. Also, ability to open up an editor. We should likely hook into readline.

[meain]

We might be able to use https://github.com/charmbracelet/bubbles and specifically https://github.com/charmbracelet/bubbletea/blob/main/examples/chat/main.go