Update MkvInfoReader, Add MkvNode extensions

MkvToolnixWrapper/Shared/TrackInfo.cs

@@ -0,0 +1,10 @@
+namespace MkvPropEditWrapper.Shared;
+
+public record TrackInfo(int Number, TrackType TrackType, string Language, bool IsDefault, bool IsForced);
+
+public enum TrackType
+{
+    Unknown,
+    Audio,
+    Subtitles
+}