Python 3.14 support

[rozyczko]

rebased against current develop
h5py with 3.14 support is already on pypi, so this should be straightforward.

[rozyczko]

Still fails!
This time, some obscure dependency of one of the modules fails to build properly on 3.14
untokenize fails.
It's known and reported myint/untokenize#4

This dependency is pulled by docformatter, used in dev environment, so quite pervasive.
docformatter is also aware of this issue PyCQA/docformatter#327 which they apparently fixed but not yet released.

[rozyczko]

Can we replace docformatter with ruff format?
just add docstring-code-format = true

[rozyczko]

From @AndrewSazonov:

Ruff format is not really a replacement for docformatter - the latter handles some more important docstring-specific formatting checks.
I’m aware of the current issue with docformatter and its dependency not supporting Python 3.14. Also, docformatter doesn’t handle Args and Returns sections in Google-style docstrings.
Because of that, I started looking into alternatives. It turns out that Google style is not that well supported in general, while NumPy style has much better support.
I tested this in the templates (in a separate branch) and found NumPy style to be better covered. So I switched to another package, format-docstring, instead of docformatter. It has good support for NumPy-style docstrings.
This means that moving to Python 3.14 should be possible by parallel switching the docstring formatter and reformatting docstrings to a better-supported style.