added code from unity

Runtime/LogChannel.cs

@@ -0,0 +1,44 @@
+using System;
+using UnityEngine;
+
+namespace Jovian.InGameLogging {
+    [Serializable]
+    public readonly struct LogChannel : IEquatable<LogChannel> {
+        private readonly string id;
+
+        public string Id => id;
+
+        public LogChannel(string id) {
+            this.id = id;
+        }
+
+        public static readonly LogChannel Combat = new("Combat");
+        public static readonly LogChannel CharacterCreation = new("CharacterCreation");
+        public static readonly LogChannel World = new("World");
+        public static readonly LogChannel General = new("General");
+
+        public bool Equals(LogChannel other) {
+            return string.Equals(id, other.id, StringComparison.Ordinal);
+        }
+
+        public override bool Equals(object obj) {
+            return obj is LogChannel other && Equals(other);
+        }
+
+        public override int GetHashCode() {
+            return id != null ? id.GetHashCode() : 0;
+        }
+
+        public override string ToString() {
+            return id ?? string.Empty;
+        }
+
+        public static bool operator ==(LogChannel left, LogChannel right) {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(LogChannel left, LogChannel right) {
+            return !left.Equals(right);
+        }
+    }
+}