Development report 2024/09/18: transform gizmo for Godot engine

It's been a while since I last updated the transform gizmo (transform handle) for the Godot engine.
I've made some improvements to the stability of movement and rotation compared to the previous version.
I've also updated the repository, but there's still work to be done.
It's now possible to manipulate VRM IK markers to a certain extent.
Git Hub repository URL: github.com/nis...