[REQ] Support x-spring-paginated in kotlin-spring

[jay-babu]

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

Currently, this is supported in spring: https://openapi-generator.tech/docs/generators/spring/#supported-vendor-extensions. Simply want that support to be available in https://openapi-generator.tech/docs/generators/kotlin-spring

Describe the solution you'd like

As described

Describe alternatives you've considered

Updating the spec to remove x-spring-paginated and use a manual approach but not the best idea.

Additional context