Nuitka Python Builder 2.1 for Nuitka 2.8.9

This is a self-hosted, standalone Windows executable built using Nuitka Python Builder itself. It was compiled with Python 3.13.7 and Nuitka 2.8.9 using Visual Studio Build Tools for C++, proving the tool works as intended.

All compiler flags are embedded inside the executable, so no external JSON editing is needed. The build is fully Windows-optimized, handling icons, UAC, plugins, and reproducible builds automatically.

This release demonstrates that NPB can build itself reliably, producing a fully portable .exe ready to run on Windows.