Support Python 3.14

[valeriupredoi]

Support for Python 3.14.0 that will be released October 7, 2025.
What's new in 3.14 https://docs.python.org/3.14/whatsnew/3.14.html

Issues

• netcdf4 and h5py/hdf5 from PyPI are problematic
• dask/distributed does not yet support Python 3.14 (but has no issues with it from PyPI)
• with hdf5/h5py/netcdf4 installed from conda-forge (instead of PyP) evironment solves, and all tests pass with python=3.14.0

Fixed issues