Implement rustman run

[yukihirop]

Summary

$ bin/foreman help run
Usage:
  foreman run COMMAND [ARGS...]

Options:
  -e, [--env=ENV]            # Specify an environment file to load, defaults to .env
  -f, [--procfile=PROCFILE]  # Default: Procfile
  -d, [--root=ROOT]          # Default: Procfile directory

Run a command using your application's environment