GPU Animation and Vertex Animation

## What problem does this solve or what need does it fill?

To achieve a battlefield effect with tens of thousands of soldiers fighting, similar to Warhammer 3.

Bevy is an ECS game engine that can naturally support hundreds of thousands of entities, but when it comes to 3D skeletal animations, it only supports a few thousand. If GPU animation is supported, it could simultaneously handle tens of thousands of skeletal animations.

## What solution would you like?

To achieve functionality similar to that of https://github.com/piti6/UnityGpuInstancedAnimation and https://github.com/mkrebser/GPUInstance, https://github.com/antzGames/Godot_Vertex_Animation_Textures_Plugin