Добавлены сервисы CalculationService, PrimitiveService, Common-сборка с типами

Необходимо реализовать в дальнейшем GetInnerPoints в PrimitiveService

StructureHelperCommon/Models/Shapes/IRectangle.cs

@@ -0,0 +1,18 @@
+namespace StructureHelperCommon.Models.Shapes
+{
+    public interface IRectangle : IShape
+    {
+        /// <summary>
+        /// Width of rectangle, m
+        /// </summary>
+        double Width { get; }
+        /// <summary>
+        /// Height of rectangle, m
+        /// </summary>
+        double Height { get; }
+        /// <summary>
+        /// Angle of rotating rectangle, rad
+        /// </summary>
+        double Angle { get; }
+    }
+}