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Some terminals may send line feed characters when pasting text with
newlines.

Co-authored-by: Michael Yang <mxyng@pm.me>

* detect arrow keys on windows
* add some helpful comments

This fixes some brittle, simple equality checks to use errors.Is. Since
go1.13, errors.Is is the idiomatic way to check for errors.
Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com>

Co-authored-by: Wen Sun <iwendellsun@gmail.com>

- update the readline package to have basic support on windows, this is not full feature parity with the unix cli yet

* dont quit ioloop on 0 rune

* check for closed channel

* remove unused error on `Close()`