Add usecases to the tests

[jan-janssen]

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[jan-janssen]

@srmnitc and @samwaseda I added use cases for pyiron_base directly to the test suite to guarantee we maintain API compatibility. If you have use cases for Material Digital and NFDI Matwerk you would like to include here as well feel free to add them. The goal is to use these use cases to define a stable API of pyiron_base so that we can converge to a version 1.0, where we guarantee that at least the commands used in those use cases remain backwards compatible.

EDIT: The use cases consist of a jupyter notebook a corresponding GitHub action and additional resources.