PrimitiveProps editing via context menu was added

StructureHelperCommon/Models/Shapes/CircleShape.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    public class CircleShape : ICircleShape
+    {
+        public double Diameter { get; set; }
+    }
+}