Merge branch 'nlg-scgpt' of github.com:ConvLab/ConvLab-3 into nlg-scgpt

.gitignore

convlab2/base_models/gpt/create_data.py

convlab2/base_models/gpt/keyword_extraction/get_keywords.sh

convlab2/base_models/gpt/keyword_extraction/get_word_loss.sh

...ab2/base_models/gpt/keyword_extraction/lmloss2keywords.py

.../base_models/gpt/keyword_extraction/merge_keywords_res.py

convlab2/base_models/gpt/keyword_extraction/train_lm.sh

convlab2/base_models/gpt/run_clm.py

convlab2/base_models/t5/create_data.py

convlab2/base_models/t5/dst/dst_metric.py

convlab2/base_models/t5/dst/merge_predict_res.py

convlab2/base_models/t5/dst/run_dst.sh

convlab2/base_models/t5/dst/serialization.py

convlab2/base_models/t5/goal2dialogue/run_goal2dialogue.sh

convlab2/base_models/t5/nlg/merge_predict_res.py

convlab2/base_models/t5/nlg/nlg.py

convlab2/base_models/t5/nlg/nlg_metric.py

convlab2/base_models/t5/nlg/run_nlg.sh

convlab2/base_models/t5/nlu/merge_predict_res.py

convlab2/base_models/t5/nlu/nlu.py