Typedocs for new V4 functions and interfaces

[cowboyd]

V4 added some new interfaces and functions, and so we need to make sure and give them good docs. Also, for apis that have changed in subtle ways, we need to review them and make sure they are still assurance. In other cases, we have to make sure that the documentation was simply brought over when it was re-written from scratch.

• withResolvers()
• action()
• call()
• constant()
• createContext()
• suspend()
• resource()
• createScope() (make sure not to export scope internal)
• spawn()