Logic for interaction diagram was added

StructureHelperCommon/Models/Shapes/IPoint3D.cs

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+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+//Copyright (c) 2023 Redikultsev Evgeny, Ekaterinburg, Russia
+//All rights reserved.
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    /// <summary>
+    /// Interface for geometry point in 3D space
+    /// </summary>
+    public interface IPoint3D : ISaveable, ICloneable
+    {
+        /// <summary>
+        /// Coordinate along X-axis
+        /// </summary>
+        double X { get; set; }
+        /// <summary>
+        /// Coordinate along Y-axis
+        /// </summary>
+        double Y { get; set; }
+        /// <summary>
+        /// Coordinate along Z-axis
+        /// </summary>
+        double Z { get; set; }
+    }
+}