We should create a list of guidelines for general C++ do's and don't do's in the codebase.

Goals:

• help new engineers ramp up with what the mongo codebase is or is not ready for C++ feature-wise, and to learn about mongoDB server C++ best practices
• help push towards a standardized C++ style for the codebase
• provide a list of standardized resources/documentation that engineers can read to learn about developing C++