Delete chunks and prune regions

Delete/Prune wait for targets to unload and remain cold, then change terrain, entity, and POI storage. They do not generate new terrain immediately.

Delete: scattered or incomplete targets

/cr delete chunk here
/cr delete chunk <world> <cx> <cz>
/cr delete marked [world]

At the player's current position, you can also use:

/cr delete here
/cr delete here chunk
/cr delete here struct
/cr delete here biome

Structure, biome, and large marked jobs show a plan and require confirmation. Delete frees reusable .mca sectors.

Prune: complete Anvil regions

/cr prune region here
/cr prune region <world> <rx> <rz>
/cr prune region chunk <world> <cx> <cz>
/cr prune region all

region chunk chooses the region containing the chunk; direct region selection uses rx and rz. A region can be truncated only when all 1,024 positions are removable and no structure is protected.

Prune already empty regions

/cr prune empty <world>

This scans index-empty region files and shrinks them after confirmation.