Use of `pkg_resources` is deprecated

https://github.com/fastai/nbdev/blob/96deb7a03bf2cf79a04e1878f67ce099e434e97f/setup.py#L5-L7

This is a friendly reminder, to tackle this in the future.

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https://setuptools.pypa.io/en/latest/pkg_resources.html

Use of pkg_resources is deprecated in favor of [importlib.resources](https://docs.python.org/3.11/library/importlib.resources.html#module-importlib.resources), [importlib.metadata](https://docs.python.org/3.11/library/importlib.metadata.html#module-importlib.metadata) and their backports ([importlib_resources](https://pypi.org/project/importlib_resources), [importlib_metadata](https://pypi.org/project/importlib_metadata)). Some useful APIs are also provided by [packaging](https://pypi.org/project/packaging) (e.g. requirements and version parsing). Users should refrain from new usage of pkg_resources and should work to port to importlib-based solutions.

Inizia dalle righe collegate 5–7 in setup.py e identifica l’uso attuale di pkg_resources. Consulta le indicazioni collegate su setuptools e Python importlib, quindi verifica che setup.py non dipenda più dall’API deprecata e che i controlli di packaging del progetto continuino a superare i test.

Scritto dal modello di indicizzazione a partire dal testo della issue.