Document custom validation

[afattahi54]

The validations are correctly documented so

@Size(max = 50) ( ->  [ 0 .. 50 ] characters)

We have lots of custom jakarta.validations

@Documented
@Constraint(validatedBy = NationalIdValidator.class)
@Target({METHOD, FIELD, PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface NationalId {
  String message() default "{validation.constraints.nationalIdValidator.message}";

  Class<?>[] groups() default {};

  Class<? extends Payload>[] payload() default {};
}

Is there any way that we can document it too. I think we can use io.swagger.v3.oas.annotations.media.Schema but i do not want to depend validations to this class. Mean while I think there might be some jakarta.validaiton feature which is build in and spring doc use them for documentation.