Change convert strategies to save xls imported forces

DataAccess/DTOs/DTOEntities/ColumnedFilePropertyDTO.cs

@@ -0,0 +1,33 @@
+using Newtonsoft.Json;
+using StructureHelperCommon.Models.Forces;
+
+namespace DataAccess.DTOs
+{
+    public class ColumnedFilePropertyDTO : IColumnedFileProperty
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get; }
+        [JsonProperty("FilePath")]
+        public string FilePath { get; set; } = string.Empty;
+        [JsonProperty("SkipRowBeforeHeaderCount")]
+        public int SkipRowBeforeHeaderCount { get; set; }
+        [JsonProperty("SkipRowHeaderCount")]
+        public int SkipRowHeaderCount { get; set; }
+        [JsonProperty("GlobalFactor")]
+        public double GlobalFactor { get; set; }
+        [JsonProperty("ColumnProperties")]
+        public List<IColumnFileProperty> ColumnProperties { get; } = new();
+
+
+        public ColumnedFilePropertyDTO(Guid id)
+        {
+            Id = id;
+        }
+
+
+        public object Clone()
+        {
+            return this;
+        }
+    }
+}