Release 1.0.0

Breaking Changes

• Duration Refactoring:
  • Duration is now strictly time-based (hours, minutes, seconds, nanos).
  • Removed years, months, days properties and factory methods from Duration.
  • Removed LocalDate::plusDuration() and LocalDate::minusDuration(). Use plusPeriod() instead.

New Features

• Period:
  • Introduced Period class for date-based amounts (years, months, days).
  • Added LocalDate::plusPeriod() and LocalDate::minusPeriod().
  • Added LocalDateTime::plusPeriod() and LocalDateTime::minusPeriod().
• LocalDateTimeDelta:
  • Introduced LocalDateTimeDelta value object combining Period and Duration.
  • Supports full ISO-8601 duration parsing (e.g., P1Y2M3DT4H5M6S).
  • Added LocalDateTime::plusDelta() and LocalDateTime::minusDelta().
• ISO-8601 Parsing:
  • Centralized ISO-8601 parsing logic in Iso8601Parser.
  • Unified parsing behavior across Period, Duration, and LocalDateTimeDelta.

Improvements

• Introduced a LocalTime value object with validation, arithmetic helpers, and TemporalAccessor integration.
• Add InvalidTime exception for clearer range violations.
• Add LocalDateTime aggregate covering combined date/time arithmetic, Instant conversion, and TemporalAccessor support.

All tests passing (262 tests, 516 assertions). PHPStan level max: No errors.