Add "emmylua" for "IDEs and Plugins" chapter

[aceyin]

Hi, i think "EmmyLUA" is a very powerful LUA plugin and should be included in the "IDEs and Plugins" list.

here is the github repo or emmylua: https://github.com/EmmyLua/IntelliJ-EmmyLua

[JaredSartin]

If you would like to make a PR here or at JaredSartin/awesome-lua (currently maintained) - that can be added!