Package-level declarations

One requested chunk and one chunk hold per active paste; all world mutation stays on the server thread.

Keeps parsed schematics in memory so a content reload does not re-parse files that did not change.

Collapses the per-block "Unsupported key" spam Minecraft's data converter produces while reading schematics saved by older versions.

An on-disk cache of schematics already converted to the running server's data version.

Tells admins, loudly, when WorldEdit itself is what stops BetterStructures from working.