feat: initial commit - HJHA game server full source

6 major server modules (PdkFriendServer/GlobalSever/ServerCore/GameModule/GameNetModule) +
game logic (GameFix/GameDAL/ServerData) +
network layer (NetWorkMessage) +
data layer (ObjectModel) +
utilities (MrWu/Core/Config/CloudAPI/dll) +
adapters (zyxAdapter/base)

.NET 8.0 C# solution, 16 projects, 958 source files

ServerCore/Attribute/MessageAttribute.cs

@@ -0,0 +1,15 @@
+namespace Server.Core
+{
+    public class MessageAttribute : BaseAttribute
+    {
+        public uint Opcode
+        {
+            get;
+        }
+
+        public MessageAttribute(uint opcode = 0)
+        {
+            this.Opcode = opcode;
+        }
+    }
+}