added code from unity

Runtime/IGameLogStore.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+
+namespace Jovian.InGameLogging {
+    public interface IGameLogStore {
+        int Count { get; }
+        int Capacity { get; }
+
+        void Add(LogChannel channel, string message);
+        void EnableChannel(LogChannel channel);
+        void DisableChannel(LogChannel channel);
+        bool IsChannelEnabled(LogChannel channel);
+        void Clear();
+        void Clear(LogChannel channel);
+
+        ReadOnlySpan<LogEntry> GetEntries();
+        int GetEntries(LogChannel channel, List<LogEntry> results);
+
+        event Action<LogEntry> OnEntryAdded;
+        event Action OnCleared;
+
+        GameLogSaveData GetSaveData();
+        void RestoreFromSaveData(GameLogSaveData data);
+    }
+}