Bahavior animation controllers aren't defined in the entity

[Julian Kalmbach]

Describe the bug
When you add a behavior animation controller to an entity, it only adds the part

"scripts": {
  "animate": [
    "animation_id"
  ]
}

but not the part where the animation is defined:

"animations": {
  "animation_id": "controller.animation.entity_identifier.animation_id"
}

Therefore the animation isn't played.

Version
Monstera: 0.4.0-SNAPSHOT16