Import BCF Markups

[moethu]

Import markups from bcf into Rhino. To accomplish this we'll need a list of what markup features can be supported in Rhino. Ideally markups like lines and texts can be part of a viewport.
https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Display_DisplayPipeline_Draw2dText.htm

[moethu]

Each Markup could be stored within a viewportinfo object and visually applied using Rhino display conduit: https://github.com/mcneel/rhino-developer-samples/blob/5/rhinocommon/cs/SampleCsCommands/SampleCsCurveDirection.cs