Initial Client/Server Communication

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

Assets/Scripts/MessagePack/Unity/Extension/UnityBlitResolver.cs

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+// 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;
+using System.Collections.Generic;
+using MessagePack.Formatters;
+using UnityEngine;
+
+namespace MessagePack.Unity.Extension
+{
+    /// <summary>
+    /// Special Resolver for Vector2[], Vector3[], Vector4[], Quaternion[], Color[], Bounds[], Rect[].
+    /// </summary>
+    public class UnityBlitResolver : IFormatterResolver
+    {
+        public static readonly UnityBlitResolver Instance = new UnityBlitResolver();
+
+        private UnityBlitResolver()
+        {
+        }
+
+        public IMessagePackFormatter<T> GetFormatter<T>()
+        {
+            return FormatterCache<T>.Formatter;
+        }
+
+        private static class FormatterCache<T>
+        {
+            public static readonly IMessagePackFormatter<T> Formatter;
+
+            static FormatterCache()
+            {
+                Formatter = (IMessagePackFormatter<T>)UnityBlitResolverGetFormatterHelper.GetFormatter(typeof(T));
+            }
+        }
+    }
+
+    /// <summary>
+    /// Special Resolver for Vector2[], Vector3[], Vector4[], Quaternion[], Color[], Bounds[], Rect[] + int[], float[], double[].
+    /// </summary>
+    public class UnityBlitWithPrimitiveArrayResolver : IFormatterResolver
+    {
+        public static readonly UnityBlitWithPrimitiveArrayResolver Instance = new UnityBlitWithPrimitiveArrayResolver();
+
+        private UnityBlitWithPrimitiveArrayResolver()
+        {
+        }
+
+        public IMessagePackFormatter<T> GetFormatter<T>()
+        {
+            return FormatterCache<T>.Formatter;
+        }
+
+        private static class FormatterCache<T>
+        {
+            internal static readonly IMessagePackFormatter<T> Formatter;
+
+            static FormatterCache()
+            {
+                Formatter = (IMessagePackFormatter<T>)UnityBlitWithPrimitiveResolverGetFormatterHelper.GetFormatter(typeof(T));
+                if (Formatter == null)
+                {
+                    Formatter = UnityBlitResolver.Instance.GetFormatter<T>();
+                }
+            }
+        }
+    }
+
+    internal static class UnityBlitResolverGetFormatterHelper
+    {
+        private static readonly Dictionary<Type, Type> FormatterMap = new Dictionary<Type, Type>()
+        {
+              { typeof(Vector2[]), typeof(Vector2ArrayBlitFormatter) },
+              { typeof(Vector3[]), typeof(Vector3ArrayBlitFormatter) },
+              { typeof(Vector4[]), typeof(Vector4ArrayBlitFormatter) },
+              { typeof(Quaternion[]), typeof(QuaternionArrayBlitFormatter) },
+              { typeof(Color[]), typeof(ColorArrayBlitFormatter) },
+              { typeof(Bounds[]), typeof(BoundsArrayBlitFormatter) },
+              { typeof(Rect[]), typeof(RectArrayBlitFormatter) },
+        };
+
+        internal static object GetFormatter(Type t)
+        {
+            Type formatterType;
+            if (FormatterMap.TryGetValue(t, out formatterType))
+            {
+                return Activator.CreateInstance(formatterType);
+            }
+
+            return null;
+        }
+    }
+
+    internal static class UnityBlitWithPrimitiveResolverGetFormatterHelper
+    {
+        private static readonly Dictionary<Type, Type> FormatterMap = new Dictionary<Type, Type>()
+        {
+              { typeof(int[]), typeof(IntArrayBlitFormatter) },
+              { typeof(float[]), typeof(FloatArrayBlitFormatter) },
+              { typeof(double[]), typeof(DoubleArrayBlitFormatter) },
+        };
+
+        internal static object GetFormatter(Type t)
+        {
+            Type formatterType;
+            if (FormatterMap.TryGetValue(t, out formatterType))
+            {
+                return Activator.CreateInstance(formatterType);
+            }
+
+            return null;
+        }
+    }
+}