Add TransitionFade user message

DemoParser/src/Parser/Components/Abstract/UserMessage.cs

@@ -543,6 +543,7 @@ public static class SvcUserMessageFactory {
 				UserMessageType.HapPunch             => new HapPunch          (dRef, val),
 				UserMessageType.SPHapWeapEvent       => new SpHapWeaponEvent  (dRef, val),
 				UserMessageType.WitchBloodSplatter   => new WitchBloodSplatter(dRef, val),
+				UserMessageType.TransitionFade       => new TransitionFade    (dRef, val),
 				UserMessageType.ScoreboardTempUpdate => new ScoreboardTempUpdate(dRef, val),
 				_ => null // I do a check for this so that I don't have to allocate the unknown type twice
 			};

DemoParser/src/Parser/Components/Messages/UserMessages/TransitionFade.cs

@@ -0,0 +1,24 @@
+using DemoParser.Parser.Components.Abstract;
+using DemoParser.Utils;
+using DemoParser.Utils.BitStreams;
+
+namespace DemoParser.Parser.Components.Messages.UserMessages {
+
+	public class TransitionFade : UserMessage {
+
+		public float Seconds;
+
+
+		public TransitionFade(SourceDemo? demoRef, byte value) : base(demoRef, value) {}
+
+
+		protected override void Parse(ref BitStreamReader bsr) {
+			Seconds = bsr.ReadFloat();
+		}
+
+
+		public override void PrettyWrite(IPrettyWriter pw) {
+			pw.Append($"seconds: {Seconds}");
+		}
+	}
+}