Initial Client/Server Communication

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

Assets/Scripts/MessagePack/Internal/ReflectionExtensions.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.Reflection;
+using System.Runtime.CompilerServices;
+
+namespace MessagePack.Internal
+{
+    internal static class ReflectionExtensions
+    {
+        public static bool IsNullable(this System.Reflection.TypeInfo type)
+        {
+            return type.IsGenericType && type.GetGenericTypeDefinition() == typeof(System.Nullable<>);
+        }
+
+        public static bool IsPublic(this System.Reflection.TypeInfo type)
+        {
+            return type.IsPublic;
+        }
+
+        public static bool IsAnonymous(this System.Reflection.TypeInfo type)
+        {
+            return type.GetCustomAttribute<CompilerGeneratedAttribute>() != null
+                && type.IsGenericType && type.Name.Contains("AnonymousType")
+                && (type.Name.StartsWith("<>") || type.Name.StartsWith("VB$"))
+                && (type.Attributes & TypeAttributes.NotPublic) == TypeAttributes.NotPublic;
+        }
+
+        public static bool IsIndexer(this System.Reflection.PropertyInfo propertyInfo)
+        {
+            return propertyInfo.GetIndexParameters().Length > 0;
+        }
+
+        public static bool IsConstructedGenericType(this System.Reflection.TypeInfo type)
+        {
+            return type.AsType().IsConstructedGenericType;
+        }
+
+        public static MethodInfo GetGetMethod(this PropertyInfo propInfo)
+        {
+            return propInfo.GetMethod;
+        }
+
+        public static MethodInfo GetSetMethod(this PropertyInfo propInfo)
+        {
+            return propInfo.SetMethod;
+        }
+    }
+}