Adjust spine basic API

[johanzhu]

What does this PR do?
Adjust spine basic API.

Changes

• Deprecated resource getter and setter
• Refractor SkeletonResource. Change name to spineResource, add an another animationData create from previous skeletonData.
  Additionally create and store animationData, which is generated based on the original skeletonData. Add a skeletonData cache to manage resource reference counting relationships based on skeletonData.
• Add createSpineResource API and export it.
• Delete addSeparateSlot API
• Modify the renderer initialization method to initialize directly by setting Skeleton and State.
• Add static methods createWithEntity and attachToEntity to facilitate manual creation of Spine animations for users.
• Remove the setting variable and move the rendering parameters zSpacing and useClipping to the outermost level of the renderer.

Impact：
After deprecating the resource API, the recommended way for users to create Spine animations will change."

old:

const spineResource = (await engine.resourceManager.load({
  ...resource,
  type: 'spine'
})) as SpineResource;
const spineEntity = new Entity(engine, 'spine-entity');
const spineAnimation = spineEntity.addComponent(SpineAnimationRenderer);
pineAnimation.resource = spineResource;
root.addChild(spineEntity);

new:

const spineResource = (await engine.resourceManager.load({
  ...resource,
  type: 'spine'
})) as SpineResource;

// create with entity
const spineAnimation = SpineAnimationRenderer.createWithEntity(spineResource);
root.addChild(spineAnimation.entity);

// or  attach to entity
const spineEntity = scene.findEntityByName('spine');
const spineAnimation = SpineRendererAnimation.attachToEntity(spineEntity, spineResource);

// or  create with skeleton and state
// In this case, use should create new skeleton and AnimationState with source data in spineResource
const spineEntity = new Entity(engine, 'spine-entity');
const spineAnimation = spineEntity.addComponent(SpineAnimationRenderer);
const { skeletonData, animationData } = spineResource;
const skeleton = new Skeleton(skeletonData);
const state = new AnimationState(animationData);
spineAnimation.skeleton = skeleton;
spineAnimation.state = state;
root.addChild(spineEntity);

Additional Context
Related to issue: #109

Please review the changes and provide feedback on the caching logic and implementation details.