Make AnimationTree support AnimatedSprite2D animations

[erdostamasa]

AnimatedSprite2D offers a simple and efficient way to manage sprite animations. However, switching between multiple animations in code can become cumbersome. Integrating AnimatedSprite2D with an AnimationNodeStateMachine in an AnimationTree would allow for a more intuitive and visual workflow when defining animation transitions.

The current workaround involves using a Sprite node with a large sprite sheet and manually animating the frames through an AnimationPlayer. This process is time-consuming and impractical, especially for projects with many animations.

Are there any technical limitations in the engine that would prevent AnimatedSprite2D from being supported in AnimationTree?

Ideally, I would be able to add AnimatedSprite2D animations: