Add OnAnimationEnd event

[Noah2610]

Event that triggers when the given animation ends.

events: {
    OnAnimationEnd(Custom("MyAnimation")):
        Echo("Animation end!"),
}

[Noah2610]

Use Once animations and OnAnimationEnd events in Peeker enemy, when this is implemented.

[Noah2610]

Working. Note that OnAnimationEnd events are only triggered if the animation is Once, because Cycle animations never end. So whenever you wanna do something after an animation ends, make that animation Once, push it (don't play it), and use the OnAnimationEnd event.