v0.2.3

Fixed

• Unwritable / missing output directory no longer dumps a raw Node stack trace. Write-path fs.* calls are now wrapped so an ENOENT/EACCES/EEXIST becomes a clean CliError with a documented non-zero exit code instead of a traceback + exit 1:
  • validatePaths now rejects an output whose parent is a regular file (Output directory is not a directory) and converts a failed mkdir into Cannot create output directory <dir>: <code> (exit 2, USAGE).
  • The LibreOffice backend's final rename/copy into the destination and the textutil-cups writeFileSync calls now raise Cannot write output <path>: <code> (exit 4, CONVERT_FAIL).
• --out-dir <regular-file> now reports a clear "not a directory" error instead of a raw EEXIST: mkdir trace.
• PDF-to-stdout (-) no longer truncates large output on a slow pipe: the buffer is now written synchronously to fd 1 and fully drained before exit.