Add multiple repeats options

Is your feature request related to a problem? Please describe.

When creating an event, you can make it repeat every month on a specific day of the month(24th) or day of some week (first Sunday), however you can’t add second or third day of the week (first, third, and fifth Sundays in my case)

Describe the solution you'd like

The drop down that currently has “first, second, third, fourth, fifth, second to last, last” could have a “multiple (expand)” button that expands the UI to add more than one field

Describe alternatives you've considered

Can’t think of anything, but would like to discuss after I’ve confirmed that Nextcloud can even display this properly.

Additional context

I know this is possible with iCal file format, but haven’t confirmed if Nextcloud supports displaying it properly.

Start by reviewing the existing event recurrence dropdown and how the calendar handles iCal recurrence rules. Confirm whether multiple weekday ordinals can be displayed correctly, then define the expanded UI and its expected behavior. Done means users can configure combinations such as the first, third, and fifth Sundays and see them represented correctly.