chore: initialize standalone UPM package

Runtime/Serialization/IShrinkNetworkSerializer.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace ShrinkNetwork
+{
+    public interface IShrinkNetworkSerializer
+    {
+        byte[] Serialize(object value);
+        object Deserialize(byte[] payload, Type type);
+        T Deserialize<T>(byte[] payload);
+    }
+}