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/index.md

@@ -9,7 +9,7 @@ AnyImage 是一款 Blender 扩展，可以把照片、视频或序列帧转换
 - 用 **Depth Plane** 快速得到可调节的浮雕式面片
 - 用 **Surface** 从单张图片生成透视纹理网格
 - 用 **Remove Background** 一键获得透明前景
-- 用 **Image Perspective** 将四点选区矫正为沿用源 Empty 朝向的矩形裁切图
+- 用 **Image Box / Lasso / Line / Polyline** 直接清理图片，或用 **Image Perspective** 做四点透视矫正
 - 处理视频和序列帧，生成可随时间播放的 Depth Plane
 - 使用 Geometry Nodes 继续调整深度、细分、重拓扑与平滑效果