add cityhall menu, add self interaction menu (Arrow Down), fix freecam, add group creation, move (faction) invite from commands to menu

ReallifeGamemode.Server/Services/ChatService.cs

@@ -74,5 +74,19 @@ namespace ReallifeGamemode.Server.Services
                 }
             });
         }
+
+        public static void BroadcastGroup(string message, Group group)
+        {
+            message = $"!{{FF8080}}** Gruppe: {message}";
+
+            NAPI.Pools.GetAllPlayers().ForEach(p =>
+            {
+                Group pGroup = p.GetUser()?.Group;
+                if (pGroup?.Id == group.Id)
+                {
+                    p.SendChatMessage(message);
+                }
+            });
+        }
     }
 }