NNTC PBR material set compressor: now supports CPU encoding

The NNTC (Non-Neural Texture Compression) PBR material set compressor now supports CPU encoding, as well as supporting CUDA. Encoding/viewing has also been tested on Windows ARM. 

https://github.com/richgel999/nntc

One major thing left: D3D12 Linear Algebra. It already supports VK_NV_cooperative_vector.

There is also an updated Prior Art disclosure, dated Sept. 19, 2026:

https://github.com/richgel999/nntc/blob/main/PRIOR_ART_DISCLOSURE.md