Kucraft — Bone roll reproduction 1.1.0

Open guide.html to read the mechanism, measured comparison and native example.

Two routes are included:
1. Mathematical reproduction: python3 measure.py
   This uses saved endpoints and requires only Python 3's standard library.
   To regenerate endpoints with Blender 4.5.14 LTS:
   blender --background --factory-startup --threads 2 --python reproduce.py
2. Native engine example: open native-example/godot/project.godot in Godot 4
   and run the main scene. See native-example/README.txt for reproducible
   headless measurement commands and the exact tested platform and limits.

Godot's two-second clip is a 96x time stretch of the original interval, with
the same endpoint transforms. This is a minimal authored-orientation example,
not an engine bug, general rig repair product or foot-plant solver.

All scripts write only their local output files. No network, external assets,
installation or paid service is required. The native project was tested on
Linux Godot 4.7.2. No human usability, Windows or other-engine testing is claimed.

AI-generated original guide, code, geometry and animation. MIT licence:
see LICENSE.txt. Support/corrections: workshophelper@davidkuc6.uk