Add support for inline type hints

Engineer: Steve Silvester 2022-03-22: Setting Target date to 2022-04-01 The technical implementation is entirely complete and all that is left are user-facing docs! 2022-03-08: Setting Target date to 2022-03-18 This project is in the home stretch and Steve is valiantly fighting the remaining mypy headaches while he finishes auditing and documenting the changes. 2022-02-24: Setting Target date to 2022-03-11 The team has completed the hefty core implementation and has been working through much smaller follow up tickets. There are only two tasks remaining, which only involve auditing and documentation. 2022-02-24: Setting Target date to 2022-02-11 The team has completed the hefty core implementation and has been working through much smaller follow up tickets. There are only two tasks remaining, which only involve auditing and documentation. 2022-01-26: Setting Target date to 2022-02-11 Core implementation is complete and undergoing an in depth code review. This is a hefty piece of work so the team is taking their time to move carefully through the review, which they have made excellent progress through. There are some additional follow up tickets that will be much smaller than the in-flight core implementation. Engineer: Steve Silvester 2022-01-11: Setting Target date to 2022-01-28 Steve has quickly dug into this hefty work and currently has the bulk of type additions in review and is collaborating with Shane on an in-depth review. On track for our original estimate of roughly 3 weeks, targeting Jan 28.