Start adding currently-unused models

SabreTools.Models/SoftwareList/DipSwitch.cs

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+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Models.SoftwareList
+{
+    [XmlRoot("dipswitch")]
+    public class DipSwitch
+    {
+        [XmlAttribute("name")]
+        public string Name { get; set; }
+
+        [XmlAttribute("tag")]
+        public string Tag { get; set; }
+
+        [XmlAttribute("mask")]
+        public string? Mask { get; set; }
+
+        [XmlElement("dipvalue")]
+        public DipValue[]? DipValue { get; set; }
+    }
+}