feat: add `RecurringRule` for `ZoneRules` for computing dates in the future (#13804) This PR adds the parsing of Posix TZ String (generating a `RecurringRule` type) in TzIf V2 and V3 footer so lean can generate timezone transitions in case the timestamp is not covered by the transitions array in `ZoneRules`.
This is the repository for Lean 4.
See Install Lean.
Please read our Contribution Guidelines first.
See Building Lean.