Enhance user plan management and update related endpoints

- Added new configuration options for user plans in `.env.example`, including `Plans__MaxCustomConfigCount` and `Plans__MinCustomConfigCount`.
- Introduced `MapPlanEndpoints` in `Program.cs` to handle plan-related API routes.
- Implemented `SetUserPlan` endpoint in `RoleEndpoints` to allow admins to assign plans to users.
- Removed deprecated role request approval endpoints from `AdminSupportEndpoints`.
- Updated `ITelegramNotifier` and related classes to reflect changes in role request handling and payment notifications.
- Refactored role management commands to remove `MaxConfigs` and focus on `MaxIpLimit` and billing settings.
- Enhanced billing request handling to accommodate plan changes instead of role changes.
- Updated various interfaces and command handlers to support new plan management features.

backend/src/PnvPanel.Api/Telegram/TelegramNotifier.cs

@@ -104,47 +104,6 @@ internal sealed class TelegramNotifier(
         }
     }
 
-    public async Task NotifyAdminsRoleRequestCreatedAsync(
-        Guid ticketId,
-        string userName,
-        string roleDescription,
-        string justification,
-        CancellationToken cancellationToken
-    )
-    {
-        if (string.IsNullOrWhiteSpace(options.Value.BotToken))
-            return;
-
-        var text =
-            $"🆕 Заявка на роль от <b>{Escape(userName)}</b>\n{Escape(roleDescription)}\nОбоснование: {Escape(justification)}";
-
-        var keyboard = new InlineKeyboardMarkup(
-            new[]
-            {
-                InlineKeyboardButton.WithCallbackData("✅ Одобрить", $"rrq:approve:{ticketId}"),
-                InlineKeyboardButton.WithCallbackData("❌ Отклонить", $"rrq:reject:{ticketId}"),
-            }
-        );
-
-        foreach (var adminId in options.Value.ParseAdminTelegramUserIds())
-        {
-            try
-            {
-                await botClient.SendMessage(
-                    adminId,
-                    text,
-                    parseMode: ParseMode.Html,
-                    replyMarkup: keyboard,
-                    cancellationToken: cancellationToken
-                );
-            }
-            catch
-            {
-                // Админ мог не запускать бота (нет чата с ботом) — пропускаем, не валим команду.
-            }
-        }
-    }
-
     public async Task NotifyAdminsExtensionRequestCreatedAsync(
         Guid ticketId,
         string userName,
@@ -196,8 +155,7 @@ internal sealed class TelegramNotifier(
         if (string.IsNullOrWhiteSpace(options.Value.BotToken))
             return;
 
-        var typeLabel = type == TicketType.RoleRequest ? "заявка на роль" : "баг/предложение";
-        var text = $"🔓 Тикет от <b>{Escape(userName)}</b> переоткрыт ({typeLabel})";
+        var text = $"🔓 Тикет от <b>{Escape(userName)}</b> переоткрыт (баг/предложение)";
 
         InlineKeyboardMarkup? keyboard = null;
         if (!string.IsNullOrWhiteSpace(options.Value.PublicSiteUrl))
@@ -280,7 +238,7 @@ internal sealed class TelegramNotifier(
         if (string.IsNullOrWhiteSpace(options.Value.BotToken))
             return;
 
-        var reason = kind == PaymentRequestKind.RoleChangeTopUp ? "доплате за смену роли" : $"оплате за {PeriodLabel(period!.Value)}";
+        var reason = kind == PaymentRequestKind.PlanChangeTopUp ? "доплате за смену тарифа" : $"оплате за {PeriodLabel(period!.Value)}";
         var text = $"💰 <b>{Escape(userName)}</b> заявляет о {reason} — {amount} ₽\nПроверьте поступление и подтвердите.";
 
         var keyboard = new InlineKeyboardMarkup(