HardSoft2023

1. rewrite requirements.txt to txt. _Binary files a/requirements.txt and b/requirements.txt differ_ 2. when use GPT4ALL, test.env tips not match the code in local_app.py. 3. Llama model problems

1、simplfy the langchai_qa.py demo code so that it can run locally 2、`python langchain_qa_quantization.py --model_path path/to/chinese_alpaca_plus_pth/7B/ggml-model-q4_0.bin --file_path doc.txt`

Feature/chinese

2

1、add chinese documents spport; 2、update the chat_prompt fit to chinese task.