Add get/set to item description tooltip

[cartermp]

Fixes #7007 by adding an additional section in the formatted tooltip text for properties that indicates if it is a getter, setter, or both.

Using this code:

type C() =
    member __.GetOnly = 3
    member __.GetSet with get () = () and set () = ()
    member __.SetOnly with set () = ()

let c = C()

Getter:

Setter:

Both:

[cartermp]

cc @Happypig375

[Happypig375]

This is going to help everyone a lot! 👍❤️🚀

[cartermp]

Ready to merge when this passes. I walked through all examples in this doc to verify it all shows appropriately: https://docs.microsoft.com/en-us/dotnet/fsharp/language-reference/members/properties