doc: update styles to WCAG AAA; add accessibility statement; reword
doc: removed line referencing API change in 1.6
doc: spelling correction.
refactor: mke Date class use __slots__
refactor: change some classes to use __slots__
chore: update base image to python 3.14 alpine release.
chore: update ci test to include 3.14/3.14t drop 3.12
chore: dependabot upgrade upload-artifact from 4.6.2 to 5.0.0 pull #68