feat: Implement cutout tool and depth generation features

- Added a new cutout tool for selecting regions in images, allowing users to choose mesh shapes based on selected areas.
- Introduced depth generation capabilities for rasterized images, including normal data extraction.
- Created jobs for generating depth planes and region data, enhancing the AI data generation workflow.
- Developed a selection refinement process for cutout regions, improving accuracy in generated outputs.
- Established a new region module for handling rasterized image regions and their associated AI generation tasks.
- Enhanced node graph builders for asset generation, facilitating smoother integration of new features.

docs/internals/node-assets.md

@@ -7,12 +7,12 @@ AnyImage 将稳定、可复用的 Geometry Nodes 和 Shader 节点组构建到 `
 ```text
 src/anyimage/
 ├── assets/O_AnyImage.blend
-└── operators/common/
-    ├── node_asset.py   # 资产路径、加载与 Modifier 输入
-    └── node_graph.py   # 共享节点图构造函数
+├── operators/common/mesh_result.py          # 运行时资产加载与 Modifier 输入
+└── operators/convert_to_plane/nodes.py     # Depth Plane 运行时节点图
 
 tools/node_assets/
 ├── build.py                # 统一构建入口
+├── node_graph.py           # Cutout 资产构建专用节点图函数
 ├── build_mesh_plane.py
 ├── build_shadeless.py
 ├── build_cutout.py
@@ -27,7 +27,7 @@ tools/node_assets/
 flowchart TD
     Scripts["tools/node_assets/build_*.py"] --> Build["Blender 后台构建"]
     Build --> Blend["assets/O_AnyImage.blend"]
-    Blend --> Loader["operators/common/node_asset.py"]
+    Blend --> Loader["operators/common/mesh_result.py"]
     Loader --> Modifier["运行时 Node Group / Modifier"]
 ```