ruby-zoom: init at 4.1.0

From the website,

https://gitlab.com/mjwhitta/zoom

Zoom adds some convenience to ag/ack/grep by allowing you to quickly
open your search results in your editor of choice.

Also available as a ruby gem.

https://rubygems.org/gems/ruby-zoom

In addition to including the ruby-zoom tool, we also added a global
override for the ruby-terminfo gem to handle the ncurses build time
dependency.