Plugin (catala.Driver.Plugin)

val register : 
  string ->
  ?man:Cmdliner.Manpage.block list ->
  ?doc:string ->
  (Catala_utils.Global.options -> unit) Cmdliner.Term.t ->
  unit

val register_subcommands : 
  string ->
  ?man:Cmdliner.Manpage.block list ->
  ?doc:string ->
  unit Cmdliner.Cmd.t list ->
  unit