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.

tests/test_models.py

@@ -89,6 +89,35 @@ class ModelTest(unittest.TestCase):
             "BEN2-ONNX",
         )
 
+    def test_realesrgan_general_x4v3_uses_verified_onnx_artifact(self):
+        model = self.models.get_downloadable_model(
+            "REALESRGAN_GENERAL_X4V3"
+        )
+
+        self.assertEqual(
+            model.repository,
+            "jonathanst29/tinier-upscale-models",
+        )
+        self.assertEqual(model.license_name, "BSD 3-Clause")
+        self.assertEqual(
+            model.download_patterns,
+            ("realesr-general-x4v3.onnx",),
+        )
+        self.assertEqual(model.ready_patterns, model.download_patterns)
+        self.assertEqual(model.r2_directory, "realesr-general-x4v3")
+        self.assertEqual(
+            model.r2_files,
+            ((
+                "realesr-general-x4v3.onnx",
+                4866396,
+                "924ebad6532777303582d4ce7811849b88869231a3ae7093e0f21200249df8d5",
+            ),),
+        )
+        self.assertEqual(
+            self.models.model_record(model)["family"],
+            "upscale",
+        )
+
     def test_enabled_da3_models_use_onnx_and_r2_checksums(self):
         for model in self.models.MODELS.values():
             if not model.enabled: