[Feature Request] Recurring event support for VCalendar (RFC 5545)

Problem to solve

Most calendar apps support recurring events. Indeed, not being able to specify if an event is a one-time event or a repeating event is a considerable gap in functionality.

The prevailing standard for recurring events is section 3.3.10 of RFC 5545 (https://tools.ietf.org/html/rfc5545#section-3.3.10), which defines the specification for recurrence rules on calendar events.

It would be great if VCalendar had built-in support for this, so that the calendar can calculate and properly render recurring events based on their recurrence rule, without having to rely on a server to perform those calculations.

Proposed solution

A new rrule prop on event objects, which takes a recurrence rule string or object (as per the spec) and automatically renders event instances on the calendar.

Support for the rrule.js plugin (https://github.com/jakubroztocil/rrule) may be strongly desirable, as it would eliminate the need for the Vuetify team to write their own recurrence rule parser/calculator.

FullCalendar has an example implementation: https://fullcalendar.io/docs/rrule-plugin