Initial Client/Server Communication

#1
Followed the MagicOnion quickstart guide, borrowing code from the chat sample app to get something working

Assets/Scripts/MessagePack/Annotations/Attributes.cs

@@ -0,0 +1,81 @@
+// Copyright (c) All contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+#pragma warning disable SA1649 // File name should match first type name
+
+namespace MessagePack
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, AllowMultiple = false, Inherited = true)]
+    public class MessagePackObjectAttribute : Attribute
+    {
+        public bool KeyAsPropertyName { get; private set; }
+
+        public MessagePackObjectAttribute(bool keyAsPropertyName = false)
+        {
+            this.KeyAsPropertyName = keyAsPropertyName;
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
+    public class KeyAttribute : Attribute
+    {
+        public int? IntKey { get; private set; }
+
+        public string StringKey { get; private set; }
+
+        public KeyAttribute(int x)
+        {
+            this.IntKey = x;
+        }
+
+        public KeyAttribute(string x)
+        {
+            this.StringKey = x;
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
+    public class IgnoreMemberAttribute : Attribute
+    {
+    }
+
+    [AttributeUsage(AttributeTargets.Interface | AttributeTargets.Class, AllowMultiple = true, Inherited = false)]
+    public class UnionAttribute : Attribute
+    {
+        public int Key { get; private set; }
+
+        public Type SubType { get; private set; }
+
+        public UnionAttribute(int key, Type subType)
+        {
+            this.Key = key;
+            this.SubType = subType;
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Constructor, AllowMultiple = false, Inherited = true)]
+    public class SerializationConstructorAttribute : Attribute
+    {
+    }
+
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Interface | AttributeTargets.Enum | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
+    public class MessagePackFormatterAttribute : Attribute
+    {
+        public Type FormatterType { get; private set; }
+
+        public object[] Arguments { get; private set; }
+
+        public MessagePackFormatterAttribute(Type formatterType)
+        {
+            this.FormatterType = formatterType;
+        }
+
+        public MessagePackFormatterAttribute(Type formatterType, params object[] arguments)
+        {
+            this.FormatterType = formatterType;
+            this.Arguments = arguments;
+        }
+    }
+}

Assets/Scripts/MessagePack/Annotations/Attributes.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: db21d74c4f54408a9acd69873192155c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/MessagePack/Annotations/IMessagePackSerializationCallbackReceiver.cs

@@ -0,0 +1,12 @@
+// Copyright (c) All contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace MessagePack
+{
+    public interface IMessagePackSerializationCallbackReceiver
+    {
+        void OnBeforeSerialize();
+
+        void OnAfterDeserialize();
+    }
+}

Assets/Scripts/MessagePack/Annotations/IMessagePackSerializationCallbackReceiver.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ef32599edd0f43366891b8da5d4aed1e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: