I/O operations: atomic writes, checksums, temporary resources, file locking.
These functions are exposed via Apero.File.* delegates. You normally call them
through Apero.File rather than directly.
Only pure I/O operations remain in Apero v3.0.0. Shell-based I/O (
Trebejo.File.IO.disk_usage/1) moved toTrebejo.File.IO.