fix javadocs target dir

update groovy to 4.0.30

update sshd-core to 2.17.1

update some maven plugins

update sl4j to 2.0.17

update java-diff-utils to 4.16

update ivy to 2.5.3

update junit to 6.0.3

update mycore to 2025.06

update groovy to 4.0.22

update apache-sshd to 2.13.1

add .theia to .gitignore

update groovy to 4.0.20

cau-repl is compatible with MyCoRe 2023.06

report unpatchable classes better