* Fix for problems when a nullable parameter has a default value
When a default value is present the parameter is moved to non-nullable. This works because we could replace the null with a default value. This will actually set the default value.
* Adds (optional) validation to the beans.
Option to set: `useBeanValidation` to `true`. This will insert validation rules from the `jakarta.validation` package much like it does with the spring generator.
Aso sneaked in `JsonProperty` annotations in order to more formally adhere to the name in the spec as opposed to configuring ObjectMappers in order to translate names to match the spec.
* Update samples
* Fix for required headerParams
* Revert "v7.12.0 release"
This reverts commit 073723cb4d41187f839fbb46565d109293fa22d7.
* set version to v7.13.0-SNAPSHOT
* update samples
* update doc
