Add curvature calculator

StructureHelperLogics/NdmCalculations/Analyses/Curvatures/ICurvatureCalcualtorLogic.cs

@@ -0,0 +1,14 @@
+using StructureHelperCommon.Models.Calculators;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Curvatures
+{
+    internal interface ICurvatureCalcualtorLogic
+    {
+        ICurvatureCalculatorInputData InputData {get;set;}
+        IResult Result { get; }
+        void Run();
+    }
+}