chore(ci): publish and test on Python 3.14 and 3.14t

[jeertmans]

Edit:

• Waiting for Remove use of deprecated jax.interpreters.batching.NotMapped in Jax 0.7 patrick-kidger/equinox#1086 to part of a new Equinox release (v0.13.1).
• Waiting for Pydantic v2.12 to be released (needed by bump-my-version).
• Bumped bearype (xrefs: BeartypeDecorHintNonpepException for union type hints on Python 3.14 beartype/beartype#555 and Jaxtyping's union types are PEP-noncompliant with Python>=3.14 ? (beartype) patrick-kidger/jaxtyping#348)
• ... ?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.34%. Comparing base (7a06c4e) to head (fd2fe68).
⚠️ Report is 33 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #323   +/-   ##
=======================================
  Coverage   84.34%   84.34%           
=======================================
  Files          32       32           
  Lines        3053     3053           
=======================================
  Hits         2575     2575           
  Misses        478      478           

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[codspeed-hq]

CodSpeed Performance Report

Merging #323 will not alter performance

_{Comparing python-3.14 (fd2fe68) with main (7a06c4e)}

Summary

✅ 10 untouched