* [Server][Spring] support interface and implementation classes for API controllers
* Omitted new string calls
* Added Log messages
* remove else
* Removed redundant if
* Update missed ;
* upgrade spring-boot-starter-parent
* upgrade springdoc and swagger-ui
* upgrade v3 swagger-annotations
* generate samples
* upgrade jackson
* fix spring cloud, remove temp comment
Putting "8" instead of "1.8" should be ok, because Spring Boot 3 requires Java 17 anyway, so it should be able to understand that 8 is the same as 1.8.
* generate samples
* upgrade JUnit 5, remove commons-io dependency, remove outdated samples/client/petstore/java/feign/feign10x/ files, generate samples
commons-io dependency was introduced in https://github.com/OpenAPITools/openapi-generator/pull/8484, but I don't see why it would be needed now or back then.
* update gson, generate samples
* update logback
* update feign
* update scribejava
* generate samples
* update httpmime
* okhttp-gson: update commons-lang & okhttp & junit-platform, remove mockito; generate samples
It seems Mockito is not used at all there.
* okhttp-gson: remove unnecessary sample files, generate sample files
* upgrade google-api-client & jersey-common, restore ClientTest, generate samples
* misc. upgrades in jersey2 and jersey3
jersey 3.1.3 is available already, but IntelliJ reports security problems in 3.1.3 and 3.1.2, so I used 3.1.1 instead.
* align some gradle&sbt files with poms, generate samples
* whitespace fix
* add spring support for SSE conform specs
see https://github.com/OpenAPITools/openapi-generator/issues/6123 for the ongoing discussion
* extend generator option documentation
* applied review suggestions
* regenerated samples
* regenerated docu
* fix code style: removed tabs
* add nullable case to spring test spec
* generate samples for changed spring input
* add nullable case to general test spec
* generate samples for changed general input
* generate samples again
* generates samples again
* re-build from new sources, generates samples again
