Add image perspective editing and related tools

- Implemented the Image Perspective tool for editing image corners in Blender.
- Created a new operator `EditImagePerspective` to handle the perspective transformation.
- Added a preview feature for the perspective adjustment.
- Introduced the `ImagePolylineTool` for editing image masks with polylines.
- Developed backend support for Real-ESRGAN model inference, including ONNX integration.
- Added functionality for image masking and background removal.
- Created unit tests for the Real-ESRGAN ONNX model to ensure correct preprocessing and inference.

docs/models-and-storage.md

@@ -9,7 +9,7 @@ AnyImage 把运行环境、模型和任务结果放在 Blender 之外，多个 B
 - **Ready** 表示模型文件已经就绪。
 - **Download** 用于按需下载模型。
 - 默认安装会准备 MoGe-2 ViT-S Normal 和 BEN2 Base。
-- DA3 与更大的 MoGe-2 模型需要时再下载即可。
+- DA3、更大的 MoGe-2，以及只供 Debug 使用的 Real-ESRGAN General x4v3 需要时再下载即可。
 
 较大的模型不一定适合所有图片。建议先用默认模型完成构图，再针对细节与性能需求比较其他模型。