Add toArray() method to Chronos, ChronosDate, and ChronosTime

[dereuromark]

Summary

Adds a toArray() method to return date/time components as an associative array. This is the inverse of the existing createFromArray() method.

• Chronos::toArray() returns: year, month, day, hour, minute, second, microsecond, timezone
• ChronosDate::toArray() returns: year, month, day
• ChronosTime::toArray() returns: hour, minute, second, microsecond

Example Usage

$dt = Chronos::create(2024, 1, 15, 12, 30, 45, 123456, 'America/Toronto');
$array = $dt->toArray();
// [
//     'year' => 2024,
//     'month' => 1,
//     'day' => 15,
//     'hour' => 12,
//     'minute' => 30,
//     'second' => 45,
//     'microsecond' => 123456,
//     'timezone' => 'America/Toronto',
// ]

// Round-trip
$restored = Chronos::createFromArray($array);