add api v1 procedure controller

app/serializers/procedure_serializer.rb

@@ -0,0 +1,11 @@
+class ProcedureSerializer < ActiveModel::Serializer
+  attributes :id,
+             :libelle,
+             :description,
+             :organisation,
+             :direction,
+             :lien_demarche,
+             :archived
+  has_many :types_de_champ,  serializer: TypeDeChampSerializer
+  has_many :types_de_piece_justificative,  serializer: TypeDePieceJustificativeSerializer
+end