Adding configs for downloading a sample dataset

[IFenton]

This will cover 2020-01-01 to 2020-01-04 and download the full list of relevant variables, including those used in IceNet. It will become the default dataset downloaded when running the code

[IFenton]

Closes #41

[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
ice_station_zebra/data_processors
cli.py					21-24
zebra_data_processor_factory.py					26
ice_station_zebra/data_processors/filters
__init__.py					8
doubling_filter.py					16-17, 21-22
ice_station_zebra/data_processors/preprocessors
__init__.py
icenet_sic.py					33-36, 41-45
ipreprocessor.py					10-11
null.py					9
Project Total

This report was generated by python-coverage-comment-action

[jemrobinson]

We should make sure that our config names match the dataset names which should (ideally) meet the Anemoi naming conventions.

Our YAML file names should replace - with _ but otherwise be the same as the dataset they create.

I think purpose can be where we put [sample, full, whatever else] as you've done here.

[IFenton]

We should make sure that our config names match the dataset names which should (ideally) meet the Anemoi naming conventions.

Done in 39f7bb8

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[jemrobinson]

👀 Reviewing now

[jemrobinson]

LGTM