Add value diagram calculator saving

DataAccess/DTOs/DTOEntities/Shapes/Point2DRangeDTO.cs

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+using Newtonsoft.Json;
+using StructureHelperCommon.Models.Shapes;
+
+namespace DataAccess.DTOs
+{
+    public class Point2DRangeDTO : IPoint2DRange
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get; }
+        [JsonProperty("StartPoint")]
+        public IPoint2D StartPoint { get; set; }
+        [JsonProperty("EndPoint")]
+        public IPoint2D EndPoint { get; set; }
+
+
+        public Point2DRangeDTO(Guid id)
+        {
+            Id = id;
+        }
+
+        public object Clone()
+        {
+            return this;
+        }
+    }
+}