Command-line interface for Muex mutation testing.

This module provides the escript entry point. It parses arguments via Muex.Config.from_args/1 and delegates execution to Muex.run/1.

The escript carries Elixir but not Mix, and nothing has loaded the project it is run in. Muex.MixBootstrap starts Mix and evaluates the project's mix.exs first, so muex and mix muex see the same project.