Fit a lot of encodings for text file. (#458)

### What problem does this PR solve?

#384

### Type of change

- [x] Performance Improvement

rag/nlp/huqie.py

@@ -8,6 +8,7 @@ import re
 import string
 import sys
 from hanziconv import HanziConv
+from huggingface_hub import snapshot_download
 from nltk import word_tokenize
 from nltk.stem import PorterStemmer, WordNetLemmatizer
 from api.utils.file_utils import get_project_base_directory