Copy missing files to .m2 even when the directory exists

[ioggstream]

I expect

• that file provided by /app/java-validators/.m2 are added to $HOME/.m2 even when $HOME/.m2 already exists

Instead

1. if .m2 exists files are not copied, this causes super-sast to download them again
2. if .m2 exists and is empty, files are still not copied

Note

• a basic implementation can just copy .m2/repository/ without overwriting
• a more complex behavior can be implemented (e.g. via rsync) and be disabled by default with feature flag like SUPER_SAST_ALWAYS_COPY_M2=false