added new citation service

.gitlab-ci.yml

docker-compose.yml

fda-citation-service/.dockerignore

fda-citation-service/.gitignore

...citation-service/.mvn/wrapper/MavenWrapperDownloader.java

fda-citation-service/.mvn/wrapper/maven-wrapper.jar

fda-citation-service/.mvn/wrapper/maven-wrapper.properties

fda-citation-service/Dockerfile

fda-citation-service/api/pom.xml

...e/api/src/main/java/at/tuwien/api/zenodo/MetadataDto.java

...pi/src/main/java/at/tuwien/api/zenodo/PreserveDoiDto.java

...rc/main/java/at/tuwien/api/zenodo/deposit/DepositDto.java

...in/java/at/tuwien/api/zenodo/deposit/DepositLinksDto.java

...api/src/main/java/at/tuwien/api/zenodo/files/FileDto.java

...rc/main/java/at/tuwien/api/zenodo/files/FileLinksDto.java

fda-citation-service/mvnw

fda-citation-service/mvnw.cmd

fda-citation-service/pom.xml

fda-citation-service/report/pom.xml

fda-citation-service/rest-service/pom.xml