* feat(demarche): describe dossier prefilling with POST * show response example
* update layout in order to show possible values * filter out non fillable types de champ
* feat(demarche): description Show the description of an opendata procedure (published or draft), with help about how to prefill a dossier for this procedure. Co-authored-by: Damien Le Thiec <damien.lethiec@gmail.com>