[REQ] JAXRS Jersey - should generate namespaces as folders

Is your feature request related to a problem? Please describe.

JaxRs Jersey code generation should support namespaces, and should generate the classes in folders.

Describe the solution you'd like

It is possible to define schema names in a dot-notation to specify a namespace.

/service/do/something:
  post:
    operationId: doSomething
    requestBody:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/my.namespace.or.package.Request'

...

schemas:
  my.namespace.or.package.Request:
    type: object
    properties: ...

In this example the request body is defined as a request object with fully qualified name: my.namespace.or.package.Request. To respect this name and to handle it as a package, the code should generate a Request.java file which is stored in directory tree my/namespace/or/package.

Additionally, if a model package is specified during generation, it should be used as a prefix. e.g.

openapicodegen generate -i input.yml -g jaxrs-jersey -o dir --additional-properties=modelPackage=my.company.my.service.bo

In that case, the fully qualified name should be:

my.company.my.service.bo.my.namespace.or.package.Request

Describe alternatives you've considered

There are no alternatives as far as I know.

An alternative solution could be :
If there is another notation to specify packages, that could also work:
e.g. perhaps a new property, e.g. x-codegen-package

/service/do/something:
  post:
    operationId: doSomething
    requestBody:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Request'

...

schemas:
  Request:
    type: object
    x-codegen-package: my.namespace.or.package
    properties: ...

Additional context

Right now, the codegeneration just strips the dots from the fully qualified name.
i.e. creating class names like MyNamespaceOrPackageRequest . It dumps all class files within the same directory, which is of course not workable for big projects.

Start by locating the JAX-RS Jersey generator entry point and its model-package handling. Reproduce the request with the shown schema names and modelPackage property, then trace how dotted schema names become Java class names and output paths. Done means generated models use namespace components as folders and preserve the configured package prefix.