cubicweb #15440762 [doc] explain where options should be placed in cubicweb-ctl [open]

$ cubicweb-ctl db-init --help
Usage: cubicweb-ctl db-init <instance>

Would be nice to have

$ cubicweb-ctl db-init --help
Usage: cubicweb-ctl db-init [options] <instance>
prioritynormal
typeenhancement
done in<not specified>
closed by<not specified>