feat(node_assets): add image plane geometry nodes and validation scripts

- Implemented `image_plane.py` to build the Image Plane Geometry Nodes group with customizable parameters for geometry, subdivide, and thickness.
- Created `image_plane_validation.py` to validate the functionality of the image plane, ensuring correct geometry generation and material assignment.
- Developed `material_layers.py` to construct shader node groups for image materials, including depth and normal handling.
- Authored `plane_layouts.py` to define node arrangements for image geometry assets.
- Introduced `shadeless.py` to create a shadeless shader node group that displays color without scene lighting while preserving shadows and reflections.

tools/node_assets/asset_library.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+import sys
+
+import bpy
+
+
+PROJECT_ROOT = Path(__file__).parents[2]
+sys.path.insert(0, str(Path(__file__).parent))
+sys.path.insert(0, str(PROJECT_ROOT / "src"))
+sys.path.insert(
+    0,
+    str(next((PROJECT_ROOT / "src" / "anyimage" / "wheels").glob("blendjob-*.whl"))),
+)
+
+from cutout import (
+    CUTOUT_NODE_GROUP_NAMES,
+    build_cutout_group,
+)
+from depth_plane import build_depth_plane_group
+from material_layers import build_material_layer_group
+from image_plane import build_image_plane_group
+from shadeless import build_shadeless_group
+OUTPUT_PATH = (
+    PROJECT_ROOT
+    / "src"
+    / "anyimage"
+    / "assets"
+    / "O_AnyImage.blend"
+)
+
+
+def main():
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    bpy.context.preferences.filepaths.save_version = 0
+    image_plane = build_image_plane_group()
+    build_depth_plane_group(image_plane)
+    build_material_layer_group()
+    build_material_layer_group(depth_plane=True)
+    build_shadeless_group()
+    for shape in CUTOUT_NODE_GROUP_NAMES:
+        build_cutout_group(shape)
+    OUTPUT_PATH.parent.mkdir(parents=True, exist_ok=True)
+    bpy.ops.wm.save_as_mainfile(filepath=str(OUTPUT_PATH), check_existing=False)
+
+
+if __name__ == "__main__":
+    main()