OZG-2626,OZG-2892 add subproject with protobuf

.gitignore

pom.xml

user-manager-interface/pom.xml

...ger-interface/src/main/protobuf/usermanager_service.proto

user-manager/.mvn/wrapper/maven-wrapper.jar

user-manager/.mvn/wrapper/maven-wrapper.properties

user-manager/lombok.config

user-manager/pom.xml

user-manager/src/main/docker/Dockerfile.jvm

user-manager/src/main/docker/Dockerfile.legacy-jar

user-manager/src/main/docker/Dockerfile.native

user-manager/src/main/docker/Dockerfile.native-micro

user-manager/src/main/docker/Dockerfile.quarkus

user-manager/src/main/docker/README.md

...anager/src/main/java/de/itvsh/kop/user/LivenessCheck.java

...r/src/main/java/de/itvsh/kop/user/RemoteUserIterator.java

user-manager/src/main/java/de/itvsh/kop/user/User.java

...nager/src/main/java/de/itvsh/kop/user/UserRepository.java

...r/src/main/java/de/itvsh/kop/user/UserResourceMapper.java

...-manager/src/main/java/de/itvsh/kop/user/UserService.java