monthGrid
fun monthGrid(yearMonth: YearMonth, firstDayOfWeek: DayOfWeek = DayOfWeek.MONDAY, outDateStyle: OutDateStyle = OutDateStyle.EndOfRow): CalendarMonth
Builds the day grid for yearMonth. Leading cells are previous-month DayPosition.InDates, trailing cells next-month DayPosition.OutDates. Row count follows the original CalendarView line-count semantics.