unjs/citty

#1 — subcommand optimization cluster

#2 — test coverage improvements cluster

#3 — custom error handling and hidden commands cluster

#4 — update and builtin usage cluster

#5 — argument parsing enhancements cluster

#6 — Git utilities and documentation updates cluster

#7 — support number args definition cluster

#8 — customizable usage display cluster

#9 — build presets and bash completion cluster