Add Nim

[juancarlospaco]

Add Nim https://nim-lang.org

https://github.com/nim-lang/Nim/wiki/Nim-for-TypeScript-Programmers#table-of-contents 😃

[lastmjs]

Hey! I most likely won't be adding Nim to Zwitterion core, but soon I'll be exposing a plugin system. You or someone else could then create a Nim plugin. I'll update this issue when the plugin system is exposed