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.

src/anyimage/operators/image_edit/polyline.py

@@ -0,0 +1,20 @@
+import bpy
+
+from .mask import EditImageMask
+
+
+class ImagePolylineTool(bpy.types.WorkSpaceTool):
+    bl_space_type = "VIEW_3D"
+    bl_context_mode = "OBJECT"
+    bl_idname = "anyimage.image_polyline"
+    bl_label = "Image Polyline"
+    bl_description = "Edit an Image Empty with a clicked polygon mask"
+    bl_icon = "ops.sculpt.polyline_mask"
+    bl_operator = EditImageMask.bl_idname
+    bl_keymap = (
+        (
+            EditImageMask.bl_idname,
+            {"type": "LEFTMOUSE", "value": "PRESS"},
+            {"properties": [("gesture", "POLYLINE")]},
+        ),
+    )