Change force tuple calculator result

StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculatorResult.cs

@@ -0,0 +1,12 @@
+using StructureHelperCommon.Models.Calculators;
+using System.Collections.Generic;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
+{
+    public interface IForceCalculatorResult : IResult
+    {
+        bool IsValid { get; set; }
+        string Description { get; set; }
+        List<IExtendedForceTupleCalculatorResult> ForcesResultList { get; }
+    }
+}