add python 3.14

[BishopWolf]

discussed in #845

Python 3.14 is the current stable and is the default in all recent systems

Subtask: Add wheel optimizations to reduce wheel size.

[tbaudier]

For the moment, not all dependencies support 3.14. For example tables for HDF5: https://pypi.org/project/tables/#files

[BishopWolf]

Is running PyTables/PyTables#1262 just not published yet

[BishopWolf]

pytables already support python 3.14 PyTables/PyTables#1276