Complete overhaul on Skippers

This change involves safety updates for serialization, better definitions of various classes, renames of some classes for accuracy, missing enum decoration, and various fixes.

SabreTools.Skippers/Detectors/NintendoEntertainmentSystem.cs

@@ -0,0 +1,44 @@
+using SabreTools.Skippers.Tests;
+
+namespace SabreTools.Skippers.Detectors
+{
+    /// <summary>
+    /// Detector for Nintendo Entertainment System headers
+    /// </summary>
+    /// <remarks>Originally from nes.xml</remarks>
+    internal class NintendoEntertainmentSystem : Detector
+    {
+        public NintendoEntertainmentSystem()
+        {
+            // Create tests
+            var rule1Test1 = new DataTest
+            {
+                Offset = "0",
+                Value = "4E45531A",
+                Result = true,
+            };
+
+            // Create rules
+            var rule1 = new Rule
+            {
+                StartOffset = "10",
+                EndOffset = "EOF",
+                Operation = HeaderSkipOperation.None,
+                Tests = new Test[]
+                {
+                    rule1Test1,
+                }
+            };
+
+            // Create file
+            Name = "Nintendo Famicon/NES";
+            Author = "Roman Scherzer";
+            Version = "1.1";
+            SourceFile = "nes";
+            Rules = new Rule[]
+            {
+                rule1,
+            };
+        }
+    }
+}