从Serein.Library分离了WebSocket/Modbus；新增了Json门户类，用于未来的Http、WebSocket、Mqtt、gRPC、QUIC扩展。

Serein.Proto.WebSocket/Handle/WebSocketHandleConfiguration.cs

@@ -0,0 +1,14 @@
+namespace Serein.Proto.WebSocket.Handle
+{
+    internal class WebSocketHandleConfiguration : HandleConfiguration
+    {
+        /// <summary>
+        /// 主题
+        /// </summary>
+        public string ThemeValue { get; set; } = string.Empty;
+    }
+
+
+
+
+}