Opt-in extra : typed parse/render of every
anim:*SMIL animation element — par, seq, iterate, audio, command, set, animate, animateColor, animateMotion, animateTransform, transitionFilter, param.
Module animationsSmil | Source packages/front/office/odf/src/extra/animations-smil.js
Hooks
hydrateSlide(slide) / dehydrateSlide(slide) — promotes anim:*
children of a slide into slide.animations[].