feat: extend bookings module with recurring booking patterns

[wumibals]

Summary

Extends the bookings module to support recurring booking series without breaking existing functionality.

Changes

• RecurringRule entity (entities/recurring-rule.entity.ts): new entity with frequency, interval, daysOfWeek, endDate, maxOccurrences, parentBookingId
• Booking entity: added isRecurring (boolean, default false) and recurringGroupId (UUID, nullable) with index
• CreateRecurringBookingDto (dto/create-recurring-booking.dto.ts): extends CreateBookingDto with a validated recurringRule object
• CreateRecurringBookingProvider: generates all instances up to 52 max, checks availability for each date, skips conflicting dates and reports them in the response, links all instances via recurringGroupId
• CancelRecurringBookingProvider: cancels only future (startDate > today) pending bookings in a group
• BookingsService: added createRecurring and cancelRecurringGroup delegates
• BookingsController: added POST /bookings/recurring and DELETE /bookings/recurring/:groupId
• BookingsModule: registered RecurringRule entity and new providers

Acceptance Criteria Met

• RecurringRule entity created
• POST /bookings/recurring generates instances with shared recurringGroupId
• Availability checked per instance; conflicts skipped and reported
• Maximum 52 instances per series
• Cancelling one booking does not affect others
• DELETE /bookings/recurring/:groupId cancels only future instances
• Existing POST /bookings flow unchanged

Closes #1082

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[yusuftomilola]

i like your implementation

[yusuftomilola]

Thanks for your contribution