* add f5 * add infer * add dit * add README * update pretrained checkpoint usage --------- Co-authored-by: yuekaiz <yuekaiz@h20-5.cm.cluster> Co-authored-by: yuekaiz <yuekaiz@l20-3.cm.cluster> Co-authored-by: yuekaiz <yuekaiz@h20-6.cm.cluster> Co-authored-by: zr_jin <peter.jin.cn@gmail.com>