BESHStatNG v0.4.0: Publication-ready Chart Export + Animated 3D XYZ Scatterplot GIFs

The latest BESHStatNG release (v0.4.0) adds two highly requested features: (1) a dedicated Chart Export dialog for publication-quality figures, and (2) an Animated GIF workflow for the 3D XYZ scatterplot. Both features work directly inside Excel and do not require installing external tools or scripting environments.