Add payments feature to admin panel

- Integrated payments functionality into the admin panel by adding a new payments router and corresponding handlers.
- Updated the admin panel actions to include a view payments option, enhancing admin capabilities.
- Implemented new database functions to retrieve successful payment counts and details for export.
- Enhanced localization with new strings for payments management in both English and Russian.

locales/en.json

@@ -122,6 +122,28 @@
   "admin_stats_recent_payments_header": "Recent Payments:",
   "admin_stats_payment_item": "{status_emoji} {amount} {currency} from {user_info} ({p_status}) [{p_date}]",
   "admin_stats_no_payments_found": "No payments found yet.",
+  
+  "admin_view_payments_button": "💰 Payments",
+  "admin_payments_header": "💰 <b>All Payments</b>",
+  "admin_no_payments_found": "No payments found.",
+  "admin_export_payments_csv": "📊 Export CSV",
+  "admin_refresh_payments": "🔄 Refresh",
+  "admin_no_payments_to_export": "No payments to export.",
+  "admin_payments_export_success": "📊 Payments export completed!\nTotal records: {count}",
+  "admin_export_sent": "File sent!",
+  
+  "admin_csv_payment_id": "ID",
+  "admin_csv_user_id": "User ID",
+  "admin_csv_username": "Username",
+  "admin_csv_first_name": "First Name",
+  "admin_csv_amount": "Amount",
+  "admin_csv_currency": "Currency",
+  "admin_csv_provider": "Provider",
+  "admin_csv_status": "Status",
+  "admin_csv_description": "Description",
+  "admin_csv_months": "Months",
+  "admin_csv_created_at": "Created At",
+  "admin_csv_provider_payment_id": "Provider Payment ID",
   "admin_stats_last_sync_header": "Last Panel Sync:",
   "admin_stats_sync_time": "Time",
   "admin_stats_sync_status": "Status",