elixir compiler

It order to use Compiler.nvim with elixir, you must initialize your project directory with mix my-proj-name.

Then you will be able to use it

Example of using Run REPL:

Considerations

• Mix run require you to :cd the directory of your elixir project before first.
• Run this file can only run single file scripts. It can't resolve dependencies. But it don't require creating a mix project.