Datepicker: Add enabledDates Prop and Month/Year Disabling

[YannisJustine]

Description

I would like to request an enhancement for the Datepicker component in PrimeVue. Specifically, I need it to behave similarly to the Calendar component in PrimeReact, which offers more advanced control over enabled and disabled dates.

Requested Features

1. enabledDates Prop:

   • A new prop enabledDates (array of valid dates) that restricts the calendar to only allow selection of the specified dates.
   • All other dates would be disabled and non-selectable.

2. Month and Year Disabling:

   • If no dates are available in a given month or year (based on enabledDates), that month/year should be disabled in the datepicker view.
   • This would help improve the user experience by preventing unnecessary navigation through months/years with no selectable dates.

Use Case

This feature is useful in scenarios where only specific dates are allowed for selection, such as booking systems, scheduling apps, or event-driven applications. The Calendar component in PrimeReact already offers this functionality, and it would be great to have it in PrimeVue as well.