IconAnimations class

The central, declarative registry binding icons → IconAnimationProfile.

Register an icon's animation identity once (typically at app start) and any animated-icon widget resolves intro/idle/morph for it automatically:

IconAnimations.registerAll({
  MorphIcons.face: const IconAnimationProfile(
    idle: IconBlink(),
    morphInto: IconMorphPlan(heroAnchor: Offset(12, 16)),
  ),
  MorphIcons.lock: const IconAnimationProfile(intro: IconSpin3D.unlock()),
});

This is what makes the engine scalable: applying a polished idle/morph to a new glyph is a one-line registration, not a new widget. Unregistered icons resolve to fallback (a plain, still profile by default — override it to give every glyph a baseline idle).