Add clipboard.lua to default widgets

[multlurk]

Hi! Thanks for awesome-hammerspoon
Can you add this module to the default list?
https://github.com/zzamboni/oh-my-hammerspoon/blob/master/plugins/misc/clipboard.lua

[ashfinal]

I just gave this module a try.
To be clear, for now I'm using Clipy, which is free and powerful.
I've found this module is still lack of some features. For instance, automatical merge for same-content items, tooltip for long content, preview for HEX color… etc.

Still, it's interesting to implement an clipboard extension with Hammerspoon. If I get spare time, I will try to make some improvement and add it into default modules. But no guarantee about specific time, to be honest. :)