* Rename bigdl/llm to ipex_llm * rm python/llm/src/bigdl * from bigdl.llm to from ipex_llm
* add argument load_in_low_bit * add docs * modify gpu doc * done --------- Co-authored-by: ivy-lv11 <lvzc@lamda.nju.edu.cn>
* test * test * fix last kv cache * add xpu readme * remove numactl for xpu example * fix link error * update max_num_batched_tokens logic * add explaination * add xpu environement version requirement * refine gpu memory * fix * fix style