Allow other modules to stop A-A asynchronously

[MrVauxs]

One issue when combining multiple animation modules is that they often exist in their own space and cannot be reliably asked "will you run? ok, I will let you go / stop you for my own implementation." This allows that by other modules effectively hooking onto WorkflowStart like this:

Hooks.on("AutomatedAnimations-WorkflowStart", (clonedData, animationData) => {
  if (!overrideEnabled() || !animationData) return;
  (clonedData.deferrals ??= []).push(
    asyncFunctionFromModule(clonedData.item, TIMEOUT)
      .then(fired => { if (fired) clonedData.stopWorkflow = true; })
  );
});