ggufy: easy quantization for the GPU poor

Hello. I was frustrated by the lack of tooling around image model conversion / quantization, or the extreme RAM requirements and complexity of the scant existing tooling, so I wrote my own. People have said I should post it here, so here it is: It has a CLI and a GUI. The GUI is easy to use, you can drag and drop files in. Both CLI and GUI are single-file executables, written in Zig because I like writing in Zig. It's pretty efficient with RAM, and takes about 1.5 minutes to quantize ZiT on my machine.