[Feature]: Create a generic Python run script for testing code changes

[tomvothecoder]

Is your feature request related to a problem?

There is currently no generic Python run script that allows us to quickly test and review code changes in e3sm_to_cmip.

Describe the solution you'd like

Create a Python run script that can be used to test and review code changes.

Examples provided here: https://e3sm-to-cmip.readthedocs.io/en/latest/development-guide.html#testing-changes-and-debugging-in-python

Describe alternatives you've considered

No response

Additional context

No response