[V3] converted nodes_images.py to V3 schema (#11206)

* converted nodes_images.py to V3 schema

* fix test

comfy_api/latest/_util/__init__.py

@@ -1,5 +1,6 @@
 from .video_types import VideoContainer, VideoCodec, VideoComponents
 from .geometry_types import VOXEL, MESH
+from .image_types import SVG
 
 __all__ = [
     # Utility Types
@@ -8,4 +9,5 @@ __all__ = [
     "VideoComponents",
     "VOXEL",
     "MESH",
+    "SVG",
 ]

comfy_api/latest/_util/image_types.py

@@ -0,0 +1,18 @@
+from io import BytesIO
+
+
+class SVG:
+    """Stores SVG representations via a list of BytesIO objects."""
+
+    def __init__(self, data: list[BytesIO]):
+        self.data = data
+
+    def combine(self, other: 'SVG') -> 'SVG':
+        return SVG(self.data + other.data)
+
+    @staticmethod
+    def combine_all(svgs: list['SVG']) -> 'SVG':
+        all_svgs_list: list[BytesIO] = []
+        for svg_item in svgs:
+            all_svgs_list.extend(svg_item.data)
+        return SVG(all_svgs_list)