Enhance bulk promo code creation with CSV export functionality

- Added the ability to generate and send a CSV file containing created promo codes, improving data accessibility for admins.
- Updated success messages to inform users about the CSV file and the number of created promo codes.
- Refactored the promo code creation logic to include detailed validity information and links for activation in the CSV output.
- Improved localization for bulk promo creation messages to enhance user experience.

locales/ru.json

@@ -154,8 +154,8 @@
   "admin_back_to_panel": "⬅️ В панель",
   "admin_promo_unlimited": "♾️ Неограниченно",
   "admin_bulk_promo_created_title": "📦 Массовое создание завершено",
-  "admin_bulk_promo_created_stats": "✅ Создано промокодов: {created_count}\n📅 Бонусные дни: {bonus_days}\n🔢 Максимальные активации: {max_activations}\n⏰ Действительны: {validity_info}",
-  "admin_bulk_promo_settings": "📝 Настройки промокодов",
+  "admin_bulk_promo_created_stats": "📊 Создано: <b>{created}</b> из <b>{total}</b>",
+  "admin_bulk_promo_settings": "🎁 Бонусные дни: <b>{bonus_days}</b>\n📊 Макс. активаций: <b>{max_activations}</b>\n⏰ Срок действия: <b>{validity}</b>",
   "admin_promo_list_page_info": "Страница {current}/{total} ({count} промокодов)",
   "admin_queue_status_button": "📊 Статус очередей",
   "admin_queue_status_title": "📊 Статус очередей сообщений",