CLI and entry points

[brandynlucca]

It may be helpful to add a CLI with appropriate entry points so users can run a pre-defined workflow/recipe/etc. via command line, such as:

survey --config workflow.yaml

where entry points can be stored in, say, pyproject.toml or a more appropriate entry. Visually, this would map out to something like:

      User types in shell:
      ┌────────────────────────┐
      │  echopop --config x    │
      └────────┬───────────────┘
               │
               ▼
      Entry Point (from pyproject.toml)
      ┌─────────────────────────────────────┐
      │  echopop = cli.main:main            │
      └────────────────┬────────────────────┘
                       │
                       ▼
            CLI code (Python)
            ┌────────────────────────────┐
            │ def main():                │
            │     parse args             │
            │     run Survey()           │
            └────────────────────────────┘

[leewujung]

I would suggest focusing on modularizing the API and it's ok to not have a command line tool. I added something like this earlier on for echopype, but it's just one more thing to worry about and not much practical use, since notebooks or python scripts are more powerful when working with data.