Define recursively -h/--help short help (#419)

Using context ctx.help_option_names https://click.palletsprojects.com/en/8.1.x/api/#context

Have to keep top level @click.help_option("-h", "--help") otherwise it’s not define since the context is not yet initialized

Close #419 (closed).

changed milestone to %0.12.0

added CLI enhancement labels

requested review from @moul

assigned to @moul

approved this merge request

merged