Grasshopper: Add section specifying how to deal with applicationIds

[AlanRynne]

There's been quite some questions in the forum about Grasshopper->Revit workflows needing an applicationId to be set in Grasshopper for the update behaviour to work.

By default, Grasshopper does not add any applicationId since the objects are re-generated on every run, there is no consistent GUID we can use to refer to the same object in successive runs. Adding the applicationId to GH objects is left to the Grasshopper user.

Latest convo about this: https://speckle.community/t/add-a-revit-phase-parameter-with-extendspeckleobject-in-gh/4146/6?u=alanrynne