feat(3d): FBX/GLTF/OBJ 加载器与骨骼动画支持 (#315)

* feat(3d): FBX/GLTF/OBJ 加载器与骨骼动画支持

* chore: 更新 pnpm-lock.yaml

* fix: 移除未使用的变量和方法

* fix: 修复 mesh-3d-editor tsconfig 引用路径

* fix: 修复正则表达式 ReDoS 漏洞

packages/asset-system/src/index.ts

@@ -57,6 +57,11 @@ export { BinaryLoader } from './loaders/BinaryLoader';
 export { AudioLoader } from './loaders/AudioLoader';
 export { PrefabLoader } from './loaders/PrefabLoader';
 
+// 3D Model Loaders | 3D 模型加载器
+export { GLTFLoader } from './loaders/GLTFLoader';
+export { OBJLoader } from './loaders/OBJLoader';
+export { FBXLoader } from './loaders/FBXLoader';
+
 // Integration
 export { EngineIntegration } from './integration/EngineIntegration';
 export type { ITextureEngineBridge, TextureLoadCallback } from './integration/EngineIntegration';