Significant overhaul of the JSONSchema support. This currently adds the following features:
- Complex nested types are exposed as descriptors with the properties pointing to them whenever necessary.
- Sets are treated as unique collections.
- Enums are handled as expected (enum values are listed).
- Renamings via @JsonProperty are considered.
- @JsonProperty(required = true) is considered and added to required properties.
- Date/time types (legacy Date, JSR-310, ThreeTenBP and Joda Time) are exposed with format "date-time".
- Objects with @JsonValue methods are considered to be rendered as String value.
- Formats and patterns can be manually configured on MetadataConfiguration.
TODOs:
- Implementation polish, JavaDoc
- Automatically inspect ObjectMapper to detect customizations made through Mixins and custom Serializers.