Consolidate package metadata in pyproject.toml

[ericpre]

No description provided.

[jlaehne]

Suggested change

	https://rosettasciio.readthedocs.io/en/latest/changes.html
	https://holospy.readthedocs.io/en/latest/changes.html

[ericpre]

I am converting to draft, because it currently doesn't work in "editable" installation (pip install -e .) because the files of the package doesn't appear in the dist.files:

from importlib import metadata

_external_extensions = tuple(metadata.entry_points(group="hyperspy.extensions"))
holospy_ext = _external_extensions[0]
print(holospy_ext.dist.files)

[ericpre]

It seems that currently it can't not work with editable install because the loading extension mechanism use importlib.metadata to find the relevant yanl file and in case of editable the module are in included in dist.files provided by importlib.metadata.
See python/cpython#96144, python/importlib_metadata#402 and pypa/packaging-problems#620 for more information.

Closing for now, we can revisit, when they will be a solution.