7815: plan add MiniAgg Platform support

see .. another repo at prepare/agg-sharp
7816: LayoutFarm.Platforms.Drawing

move drawing module from Layoutfarm.Platform.WinForms to
LayoutFarm.Platforms.Drawing
7817: Layoutfarm.ClientPlatforms

rename project ,
dependency analysis
7818: move Svg projects to related_projects folder

and remove OpenTK folder,
We will Add MiniAgg Instead
Merge branch 'v_miniAgg' into v_dev