modify calculate_score.py

modify extract_answer.py

update README

replace azureopenai to openai

update README

add argparse function to extract_answer.py and calculate_score.py

add api config file

Add citation section to README

Update links and badges in README.md

Clean up imports in calculate_score.py

Update tools.py

Remove unused imports from extract_answer.py

Delete test.py

Delete test_openai.sh

Delete task_module.py