message: Improve documentation for SpritesheetLoader
diff: @@ -4,11 +4,25 @@ import { LoaderResource } from '@pixi/loaders';
  import type { Loader, ILoaderResource } from '@pixi/loaders';
  /**
  - * {@link PIXI.Loader Loader} middleware for loading texture atlases that have been created with
  + * {@link PIXI.Loader} middleware for loading texture atlases that have been created with
  * TexturePacker or similar JSON-based spritesheet.
  *
  * This middleware automatically generates Texture resources.
  *
  + * If you're using Webpack or other bundlers and plan on bundling the atlas' JSON,
  + * use the {@link PIXI.Spritesheet} class to directly parse the JSON.
  + *
  + * The Loader's image Resource name is automatically appended with `"_image"`.
  + * If a Resource with this name is already loaded, the Loader will skip parsing the
  + * Spritesheet. The code below will generate an internal Loader Resource called `"myatlas_image"`.
  + *
  + * @example
  + * loader.add('myatlas', 'path/to/myatlas.json');
  + * loader.load(() => {
  + * loader.resources.myatlas; // atlas JSON resource
  + * loader.resources.myatlas_image; // atlas Image resource
  + * });
  + *
  * @class
  * @memberof PIXI
  * @implements PIXI.ILoaderPlugin
  