Add value diagram windows and view models

StructureHelperLogics/NdmCalculations/Analyses/ValueDiagrams/ValueDiagram.cs

@@ -0,0 +1,25 @@
+using StructureHelperCommon.Models.Shapes;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.ValueDiagrams
+{
+    public class ValueDiagram : IValueDiagram
+    {
+        public Guid Id { get; }
+        public int StepNumber { get; set; } = 50;
+        public IPoint2DRange Point2DRange { get; } = new Point2DRange(Guid.NewGuid());
+
+
+        public ValueDiagram(Guid id)
+        {
+            Id = id;
+        }
+
+        public object Clone()
+        {
+            ValueDiagram newItem = new(Guid.NewGuid());
+            var updateStrategy = new ValueDiagramUpdateStrategy();
+            updateStrategy.Update(newItem, this);
+            return newItem;
+        }
+    }
+}