Add .eye files to be used as ruby (#3509)
Add .eye files to be used as ruby (#3509)

Usually files that are used for [eye](https://github.com/kostya/eye) have the file extension `.eye`.
A eye definition file always contains ruby code.
erkyrath/linguist,erkyrath/linguist,yyx990803/linguist,stanhu/linguist,sebgod/linguist,JJ/linguist,MahmoudFayed/linguist,yyx990803/linguist,MahmoudFayed/linguist,github/linguist,sebgod/linguist,R4PaSs/linguist,JJ/linguist,stanhu/linguist,christop/linguist,pchaigno/linguist,pchaigno/linguist,yyx990803/linguist,JJ/linguist,erkyrath/linguist,tschf/linguist,github/linguist,JJ/linguist,sebgod/linguist,yyx990803/linguist,pchaigno/linguist,github/linguist,pchaigno/linguist,mwpastore/linguist,github/linguist,R4PaSs/linguist,stanhu/linguist,tschf/linguist,mwpastore/linguist,stanhu/linguist,christop/linguist,erkyrath/linguist,sebgod/linguist