Start creating Dictionary-based internal models

SabreTools.Models/Internal/Control.cs

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+using System.Xml.Serialization;
+using Newtonsoft.Json;
+
+namespace SabreTools.Models.Internal
+{
+    [JsonObject("control"), XmlRoot("control")]
+    public class Control : DatItem
+    {
+        #region Keys
+
+        /// <remarks>long</remarks>
+        public const string ButtonsKey = "buttons";
+
+        /// <remarks>long</remarks>
+        public const string KeyDeltaKey = "keydelta";
+
+        /// <remarks>long</remarks>
+        public const string MaximumKey = "maximum";
+
+        /// <remarks>long</remarks>
+        public const string MinimumKey = "minimum";
+
+        /// <remarks>long</remarks>
+        public const string PlayerKey = "player";
+
+        /// <remarks>long</remarks>
+        public const string ReqButtonsKey = "reqbuttons";
+
+        /// <remarks>(yes|no) "no"</remarks>
+        public const string ReverseKey = "reverse";
+
+        /// <remarks>long</remarks>
+        public const string Sensitivity = "sensitivity";
+
+        /// <remarks>(joy|stick|paddle|pedal|lightgun|positional|dial|trackball|mouse|only_buttons|keypad|keyboard|mahjong|hanafuda|gambling)</remarks>
+        public const string ControlTypeKey = "type";
+
+        /// <remarks>string, possibly long</remarks>
+        public const string WaysKey = "ways";
+
+        /// <remarks>string, possibly long</remarks>
+        public const string Ways2Key = "ways2";
+
+        /// <remarks>string, possibly long</remarks>
+        public const string Ways3Key = "ways3";
+
+        #endregion
+
+        public Control() => Type = ItemType.Control;
+    }
+}