Mixmix/custom config

[mixmix]

The purpose of this PR is to be able to set a custom config file path for CLI

NOTES

• the argParser cannot be async
  • => I think we're going to need to move config loading/parsing into the .action, probably loadEntropy
• the TUI cannot take the same --config as the other leaf actions
  • using the same option in multiple levels leads to collisions
  • if we really want this in TUI then we need to make the tui launch a subcommand like entropy tui or entropy ui