interface SelectSingleContextValueimport { type SelectSingleContextValue } from "https://deno.land/x/netzo@0.5.30/deps/react-day-picker.ts"; Represents the value of a SelectSingleContext. Propertiesselected: Date | undefinedThe day that has been selected. optionalonDayClick: DayClickEventHandlerEvent handler to attach to the day button to enable the single select.