Set up leave calendar

[thecodinganalyst]

HR Admin should be able to create the leave calendar for the company so that all leave calculation will be within the calendar year. E.g. 1 Jan 2026 - 31 Dec 2026, or 1 April 2026 - 31 Mar 2026.

• public holiday can be specified so that leave application for a period of time that includes public holidays, the holiday dates will not be counted.

• this should only need to be set up once and continued automatically

LeaveCalendar:

• id: text
• start: date
• end: date

PublicHoliday:

• holidayDate: date
• holidayName: text