gguf quantized 2-bit 3-bit 4-bit 5-bit 6-bit 8-bit GGUF text-generation base_model:MaziyarPanahi/xLAM-8x22b-r-GGUF base_model:quantized:MaziyarPanahi/xLAM-8x22b-r-GGUF region:us imatrix conversational