[Feature]: Support for Java 8 date formats

[Allsimon]

Feature Description

Java 8 introduced the Date/Time API that has largely replaced Joda-Time.
Relatively recently, OpenAPI has created a Formats Registry that contains format that map nicely to the Java 8 objects.

Use Case

Date/Time is a really complex system

The current version (2.2.49) only support 2 types:

    static class TestObjectDates {
        public ZonedDateTime zonedDateTime = ZonedDateTime.parse("2007-12-03T10:15:30+01:00[Europe/Paris]"); // ❌ 'date-time', no format exists in the registry for this type yet
        public OffsetDateTime offsetDateTime = OffsetDateTime.parse("2007-12-03T10:15:30+01:00"); // 🐛 complex object, should be 'date-time'
        public Instant instant = Instant.parse("2007-12-03T10:15:30+01:00"); // ✅
        public LocalDateTime localDateTime = LocalDateTime.parse("2007-12-03T10:15:30"); // 🐛 'date-time', should be 'date-time-local'
        public LocalDate localDate = LocalDate.parse("2007-12-03"); // ✅
        public OffsetTime offsetTime = OffsetTime.parse("10:15:30+01:00"); // 🐛 complex object, should be 'time'
        public LocalTime localTime = LocalTime.parse("10:15:30"); // 🐛 complex object, should be 'time-local'
        public Duration duration = Duration.parse("PT10H15M30S"); // 🐛 complex object, should be 'duration'
    }

Suggested Solution

Built-in support in swagger-core, I opened #5113 to support 'date-time-local'. I don't mind fixing every other types if this issue is accepted

Checklist

• I have searched the existing issues to ensure this is not a duplicate.
• This feature would be useful to more than just my use case.
• I have provided enough detail for the maintainers to understand the scope of the request.