Add converting strategies for beam shear actions

DataAccess/DTOs/DTOEntities/BeamShearActionDTO.cs

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+using Newtonsoft.Json;
+using StructureHelperCommon.Models.Forces;
+
+//Copyright (c) 2025 Redikultsev Evgeny, Ekaterinburg, Russia
+//All rights reserved.
+
+namespace DataAccess.DTOs
+{
+    public class BeamShearActionDTO : IBeamShearAction
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get; }
+        [JsonProperty("Name")]
+        public string Name { get; set; }
+        [JsonProperty("ExternalForce")]
+        public IFactoredForceTuple ExternalForce { get; set; } = new FactoredForceTupleDTO(Guid.Empty);
+        [JsonProperty("SupportAction")]
+        public IBeamShearAxisAction SupportAction { get; set; } = new BeamShearAxisActionDTO(Guid.Empty);
+
+        public BeamShearActionDTO(Guid id)
+        {
+            Id = id;
+        }
+
+        public object Clone()
+        {
+            return this;
+        }
+    }
+}