release 8.25.0

Reformat files that woudl only touch a single line.

Remove old Python2/3 informations from the Readme.rst

Whats new 8.25 (#14448)

stricter types (#14447)

stricter types

Whats new 8.25

try to fix build on 3.13 (#14445)

try to fix build on 3.13

Use and depend on intersphinx_registry for doc building. (#14444) We try to still work if intersphinx_registry is not importable as it might not be packaged yet, but it is now avail on conda forge, so it should not be too hard.