transformers safetensors starcoder2 text-generation code dataset:bigcode/the-stack-v2-train arxiv:2305.13245 arxiv:2205.14135 arxiv:2004.05150 arxiv:2207.14255 arxiv:2402.19173 license:bigcode-openrail-m model-index autotrain_compatible text-generation-inference endpoints_compatible 4-bit gptq region:us