Add basic network classes and message pooling

Source/Engine/Networking/NetworkConfig.h

@@ -0,0 +1,15 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+API_STRUCT() struct FLAXENGINE_API NetworkConfig
+{
+public:
+    INetworkDriver* NetworkDriver = nullptr;
+
+public:
+    uint16 ConnectionsLimit = 32;
+    uint16 Port = 7777;
+    uint16 MessageSize = 1500; // MTU
+    uint16 MessagePoolSize = 2048; // (RX and TX)
+};