Add tools and tests for AnyImage model management and documentation

- Implement sync_models.py for preparing and uploading ONNX artifacts.
- Create build_node.py for building and validating Blender scripts.
- Add docs.py for building and previewing documentation with Mike or MkDocs.
- Introduce model_exports.py for exporting PyTorch models to ONNX format.
- Develop pack.py for packaging the project with dependencies for different platforms.
- Add test_sync_models.py to validate sync_models functionality.
- Add test_tool_commands.py to ensure repository tools have correct command scripts.
- Initialize tools package with __init__.py.

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
         run: uv run --frozen pytest
 
       - name: 构建扩展
-        run: uv run --frozen python pack.py
+        run: uv run --frozen pack
 
       - name: 发布扩展包
         uses: https://gitea.com/actions/gitea-release-action@v1.3.6