gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit GGUF text-generation base_model:VongolaChouko/Starcannon-Unleashed-12B-v1.0 base_model:quantized:VongolaChouko/Starcannon-Unleashed-12B-v1.0 region:us imatrix