Implement worker AddItem commands

src/MxGateway.Worker/MxAccess/MxAccessComServer.cs

@@ -35,6 +35,44 @@ public sealed class MxAccessComServer : IMxAccessServer
         Invoke(nameof(Unregister), serverHandle);
     }
 
+    public int AddItem(
+        int serverHandle,
+        string itemDefinition)
+    {
+        if (mxAccessComObject is ILMXProxyServer mxAccessServer)
+        {
+            return mxAccessServer.AddItem(serverHandle, itemDefinition);
+        }
+
+        return (int)Invoke(nameof(AddItem), serverHandle, itemDefinition);
+    }
+
+    public int AddItem2(
+        int serverHandle,
+        string itemDefinition,
+        string itemContext)
+    {
+        if (mxAccessComObject is ILMXProxyServer3 mxAccessServer)
+        {
+            return mxAccessServer.AddItem2(serverHandle, itemDefinition, itemContext);
+        }
+
+        return (int)Invoke(nameof(AddItem2), serverHandle, itemDefinition, itemContext);
+    }
+
+    public void RemoveItem(
+        int serverHandle,
+        int itemHandle)
+    {
+        if (mxAccessComObject is ILMXProxyServer mxAccessServer)
+        {
+            mxAccessServer.RemoveItem(serverHandle, itemHandle);
+            return;
+        }
+
+        Invoke(nameof(RemoveItem), serverHandle, itemHandle);
+    }
+
     private object Invoke(
         string methodName,
         params object[] arguments)