Add beam shear converting to DTO

DataAccess/DTOs/DTOEntities/NdmCrossSections/NdmElementDTO.cs

@@ -0,0 +1,31 @@
+using Newtonsoft.Json;
+using StructureHelper.Models.Materials;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperLogics.NdmCalculations.Primitives;
+
+namespace DataAccess.DTOs
+{
+    public class NdmElementDTO : INdmElement
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get;}
+        [JsonProperty("HeadMaterial")]
+        public IHeadMaterial? HeadMaterial { get; set; } = new HeadMaterial();
+        [JsonProperty("Triangulate")]
+        public bool Triangulate { get; set; }
+        [JsonProperty("UsersPrestrain")]
+        public IForceTuple UsersPrestrain { get; set; } = new ForceTupleDTO(Guid.NewGuid());
+        [JsonProperty("AutoPrestrain")]
+        public IForceTuple AutoPrestrain { get; set; } = new ForceTupleDTO(Guid.NewGuid());
+
+        public NdmElementDTO(Guid id)
+        {
+            Id = id;
+        }
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}