Improve documentation

engines/dfc_provider/README.md

@@ -8,3 +8,5 @@ Basically, it allows an OFN user linked to an enterprise:
 * to be authenticated thanks to an Access Token from DFC Authorization server (using an OIDC implementation)
 
 The API endpoint for the catalog is `/api/dfc_provider/enterprise/prodcuts.json` and you need to pass the token inside an authentication header (`Authentication: Bearer 123mytoken456`).
+
+This feature is still under active development.

engines/dfc_provider/app/controllers/dfc_provider/api/catalog_items_controller.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 # Controller used to provide the API products for the DFC application
+# CatalogItems are items that are being sold by the entreprise.
 module DfcProvider
   module Api
     class CatalogItemsController < DfcProvider::Api::BaseController

engines/dfc_provider/app/controllers/dfc_provider/api/supplied_products_controller.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 # Controller used to provide the SuppliedProducts API for the DFC application
+# SuppliedProducts are products that are managed by an entrerprise.
 module DfcProvider
   module Api
     class SuppliedProductsController < DfcProvider::Api::BaseController