Make a Python version of the OIG risk audit toolkit

The risk of over-coding is getting higher. The Office of Inspector General (OIG) has been increasing the audit intensity over the years. Recently, the OIG publicly released their audit methodology on 12/14/2023. Although the methodology is well documented in the PDF file, the audit algorithm is not easy to apply to the real data. We plan to implement the algorithm in Python as we did for the HCC algorithm, so that many healthcare data engineers can try the logic and prevent any overdocumentation in the future.