Upgrade to 3.14

[CEXT-Dan]

Upgrade to 3.14?

What’s new in Python 3.14

• Free threading is not an option yet. No CAD API is thread safe yet and likely won’t be in the near future.

• Better support for sub-interpreters looks interesting with concurrent.interpreters, limited because we can’t start a new interpreter, and switch to it in a command context. It may be possible to start a new interpreter from a new thread.

• Incremental garbage collection, hopefully this does not break our current system

My vote is to wait for wxWidgets 3.4.0, this way we don’t break compatibility more than necessary,