Add some compoments

[skanehira]

Describe the feature you'd like
I want to add some components into gocui to create modal, form, etc easily

Describe alternatives you've considered
I made the components.
How about merging this into gocui?
https://github.com/skanehira/gocui-component

[mjarkk]

I think we need to hold the base library minimal, thought the current state of gocui is extremely minimal and some UI helpers / components would be a nice addition.

I'm oke with merging gocui-component into gocui.

[glvr182]

Agreed, keeping the library small is important, but i think adding @skanehira 's components would have more pros than cons

[Syleron]

do we not feel that these components are considered essential to any "minimalistic" UI framework?