New:
- Added piston protection.
- Added entity protection.
- Protects armor stands, item frames, glow item frames, paintings, villagers, animals, boats, minecarts and other decorative/passive entities.
- Added dispenser protection.
- Prevents dispensers/droppers from placing dangerous or protected items into the spawn area.

Improved:
- /spl info now shows Pistons and Entities protection status.
- /spl preview now cancels any previous active preview for the same player.

Config:
- Updated config-version to 5.
- Added:
- protections.pistons
- protections.entities
- messages.<lang>.no-entity
- Existing configs are migrated automatically with backup.