zstd:chunked compression

This project adds zstd:chunked compression to Konflux builds while keeping compatibility with older Docker versions. It does this by pushing both gzip and zstd images in the same index, so older clients use gzip and newer ones get faster pulls. I’ll update build tasks, fix release pipeline issues caused by dual manifests, and ensure everything works with proper tests and docs. The result is faster image pulls with no breakage for existing users.