Date manipulation routines

Changes for 6.95

• Better support for weeks of the year Added the Week1ofYear config variable and deprecated the Jan1Week1 variable. The first week of the year can now be specified much more easily.
• Support for the standard POSIX strftime directives in printf The Date::Manip:😁ate:😛rintf method uses a set of directives which is similar, but not identical, to the POSIX strftime directives.
• Time zone fixes Newest zoneinfo data (tzdata 2024a).