[cm] greet new members & refactor rules

modules/ChatManagement/ChatManagement.cs

@@ -1,4 +1,6 @@
 using Kruzya.TelegramBot.Core;
+using Microsoft.Extensions.DependencyInjection;
+using West.TelegramBot.ChatManagement.Service;
 
 namespace West.TelegramBot.ChatManagement;
 
@@ -7,4 +9,9 @@ public class ChatManagement : Module
     public ChatManagement(Core core) : base(core)
     {
     }
+
+    public override void ConfigureServices(IServiceCollection services)
+    {
+        services.AddScoped<RulesService>();
+    }
 }