Initial Client/Server Communication

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

Assets/Scripts/MessagePack/MessagePackCompression.cs

@@ -0,0 +1,57 @@
+// 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
+{
+    /// <summary>
+    /// Identifies the various compression schemes which might be applied at the msgpack level.
+    /// </summary>
+    public enum MessagePackCompression
+    {
+        /// <summary>
+        /// No compression is applied at the msgpack level.
+        /// </summary>
+        None,
+
+        /// <summary>
+        /// Compresses an entire msgpack sequence as a single lz4 block format.
+        /// This is the simple compression that achieves best compression ratio,
+        /// at the cost of copying the entire sequence when necessary to get contiguous memory.
+        /// </summary>
+        /// <remarks>
+        /// Uses msgpack type code ext99 and is compatible with v1 of this library.
+        /// </remarks>
+        /// <devremarks>
+        /// See also ThisLibraryExtensionTypeCodes.Lz4Block
+        /// </devremarks>
+        Lz4Block,
+
+        /// <summary>
+        /// Compresses an entire msgpack sequence as a array of lz4 block format.
+        /// This is compressed/decompressed in chunks that do not consume LOH,
+        /// but the compression ratio is slightly sacrificed.
+        /// </summary>
+        /// <remarks>
+        /// Uses msgpack type code ext98 in array.
+        /// </remarks>
+        /// <devremarks>
+        /// See also ThisLibraryExtensionTypeCodes.Lz4BlockArray
+        /// </devremarks>
+        Lz4BlockArray,
+    }
+
+#pragma warning disable SA1649 // File name should match first type name
+
+    /// <summary>
+    /// Extensions for <see cref="MessagePackCompression"/>.
+    /// </summary>
+    internal static class MessagePackCompressionExtensions
+    {
+        public static bool IsCompression(this MessagePackCompression compression)
+        {
+            return compression != MessagePackCompression.None;
+        }
+    }
+
+#pragma warning restore SA1649 // File name should match first type name
+}