Misc replay related changes (#13250)

Content.Shared/Administration/IGamePrototypeLoadManager.cs

@@ -1,3 +1,6 @@
+using Robust.Shared.Serialization;
+using Robust.Shared.Utility;
+
 namespace Content.Shared.Administration;
 
 public interface IGamePrototypeLoadManager
@@ -5,3 +8,12 @@ public interface IGamePrototypeLoadManager
     public void Initialize();
     public void SendGamePrototype(string prototype);
 }
+
+// TODO REPLAYS
+// Figure out a way to just directly save NetMessage objects to replays. This just uses IRobustSerializer as a crutch.
+
+[Serializable, NetSerializable]
+public sealed class ReplayPrototypeUploadMsg
+{
+    public string PrototypeData = default!;
+}