We currently use a cache from google guava.

However, that is deprecated and should be replaced with its successor, caffeine.
https://guava.dev/releases/snapshot-jre/api/docs/com/google/common/cache/CacheBuilder.html#prefer-caffeine-over-guava-s-caching-api-heading

https://github.com/ben-manes/caffeine

We use it for FileAnnotationCache and CitationStyleCache

https://github.com/JabRef/jabref/blob/main/jablib/src/main/java/org/jabref/logic/pdf/FileAnnotationCache.java

https://github.com/JabRef/jabref/blob/7f5edd6799a47cc002b54b83982b7e42d25892db/jablib/src/main/java/org/jabref/logic/citationstyle/CitationStyleCache.java

Add caffeine dependency to versions and dependency-rules
Migrate the code
Add a test