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

README.md

@@ -0,0 +1,41 @@
+# KK Blender Porter Pack
+
+![image](https://raw.githubusercontent.com/FlailingFog/flailingfog.github.io/master/assets/images/readme.png)
+
+Plugin pack for exporting and cleaning up Koikatsu characters in Blender.  
+
+The ```KKBP exporter for Koikatsu``` exports the character's mesh, armature and color data from the game. The ```KKBP importer for Blender``` processes that data to setup the character in Blender. Once characters are setup in Blender, they can be saved as FBX files for use in other programs. 
+
+*    **Download:** https://github.com/FlailingFog/KK-Blender-Porter-Pack/releases  
+*    **How to use the plugins:** https://kkbpwiki.github.io/.  
+*    **Changelog:** https://github.com/FlailingFog/KK-Blender-Shader-Pack/blob/master/Changelog.md  
+*    **Alternate download (this is a live snapshot of the repo that might not work!):** https://github.com/FlailingFog/KK-Blender-Porter-Pack/archive/refs/heads/master.zip  
+
+## Video walkthrough of the plugins
+
+[(Click for playlist!)  
+![ ](https://raw.githubusercontent.com/kkbpwiki/kkbpwiki.github.io/master/assets/images/readmeyt.png)](https://www.youtube.com/watch?v=hib8NWBvgvA&list=PLhiuav2SCuveMgQUA2YqqbSE7BtOrkZ-Q&index=1)
+
+## Help
+
+[Check the wiki for FAQ and basic info.](https://kkbpwiki.github.io/)  
+If you're still having trouble please [create a new issue](https://github.com/FlailingFog/KK-Blender-Porter-Pack/issues).
+
+## Contributing
+
+Any contributions are welcome! Please check out the links below:
+* [The issues page](https://github.com/FlailingFog/KK-Blender-Porter-Pack/issues)
+* [Make a pull request](https://github.com/FlailingFog/KK-Blender-Porter-Pack/pulls)
+* [Edit the wiki site](https://kkbpwiki.github.io/) (click the edit buttons on the top right of any page, then make a pull request)
+* [Translate the KKBP interface](https://github.com/FlailingFog/KK-Blender-Porter-Pack/tree/master/interface)  
+
+This project does not accept donations.
+
+## Similar Projects
+
+* [KKBP Exporter](https://github.com/FlailingFog/KKBP_Exporter)
+* [SKLX-creator](https://www.patreon.com/posts/sklx-lite-118039975)
+* [KKPMX](https://github.com/CazzoPMX/KKPMX)
+* [Koikatsu Pmx Exporter (Reverse Engineered & updated)](https://github.com/Snittern/KoikatsuPmxExporterReverseEngineered)
+* [Grey's mesh exporter for Koikatsu](https://github.com/FlailingFog/KK-Blender-Porter-Pack/tree/9fcef4127ba56b4e8e8718fb546945fc00eaaad9/GME)
+