Implement billing status feature in Telegram bot

- Added a new command `/billing` and a corresponding menu option for users with billing roles to check their payment status.
- Implemented `HandleBillingStatusAsync` method to retrieve and display billing information, including the payment expiration date and remaining time in a user-friendly format.
- Updated the main menu to conditionally show the billing status option based on the user's role.
- Enhanced the `PaidUntilBadge` component to format and display the remaining time until the next payment in both days and hours/minutes.
- Updated documentation to reflect the new billing status feature and its usage in the Telegram bot.

frontend/src/shared/lib/i18n.ts

@@ -112,6 +112,8 @@ const resources = {
         neverPaidShort: 'Не оплачено',
         expiredShort: 'Истекло',
         daysRemaining: '{{count}} дн.',
+        hoursMinutesRemaining: '{{hours}} ч {{minutes}} мин',
+        minutesRemaining: '{{count}} мин',
         newRequest: 'Оформить оплату',
         period: 'Период',
         periods: {
@@ -626,6 +628,8 @@ const resources = {
         neverPaidShort: 'Not paid',
         expiredShort: 'Expired',
         daysRemaining: '{{count}}d',
+        hoursMinutesRemaining: '{{hours}}h {{minutes}}m',
+        minutesRemaining: '{{count}}m',
         newRequest: 'Set up payment',
         period: 'Period',
         periods: {