refactor: 移除无用的 imgUsage 和 usedImages 逻辑

[yiiqii]

• fix(demo): 本地 demo 资源统一到 public 目录下
• style(type): 规范 shape 类型

Summary by CodeRabbit

Release Notes

• New Features

  • Enhanced asset management for scene loading and image processing, leading to improved performance and maintainability.
  • Introduced a new interface for renderer options, allowing for better texture management and masking capabilities.

• Improvements

  • Streamlined handling of image data and texture references in compositions, improving resource management.
  • Updated JSON asset URL handling in the Player instance for more reliable scene loading.
  • Enhanced documentation for scene and load options for better clarity.

• Bug Fixes

  • Improved test cases for sprite animations to ensure accurate behavior and transformations based on parent nodes.