feat: 增加音视频插件

[Sruimeng]

refactor(sprite): 优化Sprite、Text、Video 的继承逻辑

Summary by CodeRabbit

• New Features

  • Introduced functionality for processing audio and video assets in the Asset Manager.
  • Added a method to create textures from video URLs in the Texture class.
  • New TextItemProps interface for improved data handling in the TextComponent class.
  • New MediaType enum to differentiate between video and audio types.

• Bug Fixes

  • Re-included the post-process-volume component and added the base-render-component.

• Documentation

  • Added a LICENSE file outlining usage rights and conditions.
  • Introduced a README.md for the Galacean Effects Media Plugin detailing usage and development instructions.
  • Added a NOTICE file summarizing third-party software components and their licensing terms.