Support resize algorithm selection (lanczos3/catmullrom/bilinear/nearest)
and overwrite behavior (auto-rename/overwrite/skip) in the CLI process
command, matching the GUI functionality.
Process command discovers images, builds pipeline from preset or CLI
flags (--resize, --format, --quality, --strip-metadata, --recursive),
executes with progress output, prints results with size savings, and
saves to history. Preset list/export/import use the storage module.
