Previous chest opening animation is reforged with skeletons

Remade the animation with skeletons.

No deformation required, so just make skeleton be parent to the lid.

Reference:

• https://docs.blender.org/manual/en/4.2/animation/armatures/skinning/introduction.html
• https://docs.blender.org/manual/en/4.2/scene_layout/object/editing/parent.html