feat(world-streaming): 添加世界流式加载系统 (#288)

实现基于区块的世界流式加载系统，支持开放世界游戏：

运行时包 (@esengine/world-streaming):
- ChunkComponent: 区块实体组件，包含坐标、边界、状态
- StreamingAnchorComponent: 流式锚点组件（玩家/摄像机）
- ChunkLoaderComponent: 流式加载配置组件
- ChunkStreamingSystem: 区块加载/卸载调度系统
- ChunkCullingSystem: 区块可见性剔除系统
- ChunkManager: 区块生命周期管理服务
- SpatialHashGrid: 空间哈希网格
- ChunkSerializer: 区块序列化

编辑器包 (@esengine/world-streaming-editor):
- ChunkVisualizer: 区块可视化覆盖层
- ChunkLoaderInspectorProvider: 区块加载器检视器
- StreamingAnchorInspectorProvider: 流式锚点检视器
- WorldStreamingPlugin: 完整插件导出

pnpm-lock.yaml

@@ -1559,6 +1559,62 @@ importers:
         specifier: ^5.3.3
         version: 5.9.3
 
+  packages/world-streaming:
+    dependencies:
+      '@esengine/ecs-framework':
+        specifier: workspace:*
+        version: link:../core
+      '@esengine/engine-core':
+        specifier: workspace:*
+        version: link:../engine-core
+    devDependencies:
+      tsup:
+        specifier: ^8.0.1
+        version: 8.5.1(@microsoft/api-extractor@7.55.1(@types/node@20.19.25))(@swc/core@1.15.3)(jiti@2.6.1)(postcss@8.5.6)(typescript@5.9.3)(yaml@2.8.1)
+      typescript:
+        specifier: ^5.3.3
+        version: 5.9.3
+
+  packages/world-streaming-editor:
+    dependencies:
+      '@esengine/world-streaming':
+        specifier: workspace:*
+        version: link:../world-streaming
+    devDependencies:
+      '@esengine/build-config':
+        specifier: workspace:*
+        version: link:../build-config
+      '@esengine/ecs-framework':
+        specifier: workspace:*
+        version: link:../core
+      '@esengine/editor-core':
+        specifier: workspace:*
+        version: link:../editor-core
+      '@esengine/engine-core':
+        specifier: workspace:*
+        version: link:../engine-core
+      '@types/react':
+        specifier: ^18.3.12
+        version: 18.3.27
+      lucide-react:
+        specifier: ^0.545.0
+        version: 0.545.0(react@18.3.1)
+      react:
+        specifier: ^18.3.1
+        version: 18.3.1
+      rimraf:
+        specifier: ^5.0.5
+        version: 5.0.10
+      tsup:
+        specifier: ^8.0.0
+        version: 8.5.1(@microsoft/api-extractor@7.55.1(@types/node@20.19.25))(@swc/core@1.15.3)(jiti@2.6.1)(postcss@8.5.6)(typescript@5.9.3)(yaml@2.8.1)
+      typescript:
+        specifier: ^5.3.3
+        version: 5.9.3
+      zustand:
+        specifier: ^5.0.8
+        version: 5.0.8(@types/react@18.3.27)(react@18.3.1)(use-sync-external-store@1.6.0(react@18.3.1))
+
 packages:
 
   '@algolia/abtesting@1.10.0':