overhaul provider structure

OwnChar.Server/Data/ClientServerDataProvider.cs

@@ -0,0 +1,17 @@
+using Pilz.Plugins.Advanced;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OwnChar.Server.Data
+{
+    public class ClientServerDataProvider() : PluginFunction(IServerDataProvider.FeatureCode, "ownchar.clientserver"), IServerDataProvider
+    {
+        protected override object? ExecuteFunction(PluginFunctionParameter? @params)
+        {
+            return this;
+        }
+    }
+}