feat: Add KoikatsuBlenderPipeline addon with import/export functionality

- Add core addon files (__init__.py, KKPanel.py, preferences.py, common.py)
- Add import pipeline with armature, mesh, and material modification modules
- Add export pipeline with material baking and FBX preparation utilities
- Add material combiner tool for texture atlas generation and optimization
- Add extras utilities for animation, rigging, and asset management
- Add bone orientation data from better_fbx for accurate skeletal structure
- Add comprehensive documentation and wiki with multi-language support (EN, JP, ZH)
- Add animation library retargeting lists for ARP and Rokoko motion capture
- Add Rigify integration scripts for advanced rigging workflows
- Add shader file (KK Shader V8.0.blend) for material rendering
- Add manifest and license files for addon distribution
- Add changelog documenting version history and improvements
- Initialize complete Blender addon project for Koikatsu character import/export

exporting/material_combiner/images.py

@@ -0,0 +1,19 @@
+import os
+from typing import Union
+
+import bpy
+
+
+def get_image(tex: bpy.types.Texture) -> bpy.types.Image:
+    return tex.image if tex and hasattr(tex, 'image') and tex.image else None
+
+
+def get_packed_file(image: Union[bpy.types.Image, None]) -> Union[bpy.types.PackedFile, None]:
+    if image and not image.packed_file and _get_image_path(image):
+        image.pack()
+    return image.packed_file if image and image.packed_file else None
+
+
+def _get_image_path(img: Union[bpy.types.Image, None]) -> Union[str, None]:
+    path = os.path.abspath(bpy.path.abspath(img.filepath)) if img else ''
+    return path if os.path.isfile(path) and not path.lower().endswith(('.spa', '.sph')) else None