Added multiplayer plugin

Assets/Mirror/Runtime/Transport/Telepathy/Message.cs

@@ -0,0 +1,18 @@
+// incoming message queue of <connectionId, message>
+// (not a HashSet because one connection can have multiple new messages)
+// -> a struct to minimize GC
+namespace Telepathy
+{
+    public struct Message
+    {
+        public readonly int connectionId;
+        public readonly EventType eventType;
+        public readonly byte[] data;
+        public Message(int connectionId, EventType eventType, byte[] data)
+        {
+            this.connectionId = connectionId;
+            this.eventType = eventType;
+            this.data = data;
+        }
+    }
+}