Removed API V9 Dependency on System.Drawing.Common

Starting from API V9Preview5, the dependency on System.Drawing.Common has been removed, as this nuget is only supported on Windows.

Also, the method TryGetProductMenuBitmap has been removed from IProduct, and the method TryGetProductGroupMenuBitmap has been removed from IProductGroup. To obtain an image from its byte array, you can use the code from SamplePlugin or use any convenient library for working with graphics.