Allow Slot-Specific Quantities for Booking Products

[happybanana78]

Currently, booking products (e.g., table reservations) use a single, global quantity field to control availability across all time slots. This setup only allows for a shared, overarching capacity limit, meaning that each time slot draws from the same pool of available reservations.

The global quantity field prevents setting unique capacities for individual time slots. For example, a restaurant might want to allow:

10 reservations between 9:00 pm and 10:00 pm
20 reservations between 11:00 pm and 1:00 am
Under the current system, this setup isn’t possible since all slots share the same quantity limit.

It should be possible to define specific quantities for each time slot independently. This would allow booking products to have variable capacities based on the time slot, better accommodating businesses with fluctuating availability throughout operating hours.

I would be nice to introduce a per-slot quantity setting that allows each time slot within a booking product to have its own unique capacity, independent of other slots.