wording: add doc link concerning excel macros

app/components/dossiers/export_component/export_component.en.yml

@@ -12,3 +12,6 @@ en:
   download:
     one: Download a file
     other: Download %{count} files
+  macros_doc:
+    title: "Macros documentation"
+    url: "https://doc.demarches-simplifiees.fr/pour-aller-plus-loin/exports-et-macros"

app/components/dossiers/export_component/export_component.fr.yml

@@ -12,3 +12,6 @@ fr:
   download:
     one: Télécharger un dossier
     other: Télécharger %{count} dossiers
+  macros_doc:
+    title: "documentation sur les macros"
+    url: "https://doc.demarches-simplifiees.fr/pour-aller-plus-loin/exports-et-macros"

app/components/dossiers/export_component/export_component.html.haml

@@ -1,4 +1,12 @@
 = render Dropdown::MenuComponent.new(wrapper: :span, button_options: { class: ['fr-btn--sm', @class_btn.present? ? @class_btn : 'fr-btn--secondary']}, menu_options: { id: @count.nil? ? "download_menu" : "download_all_menu", class: ['dropdown-export'] }) do |menu|
+  - menu.with_menu_header_html do
+    %p.menu-component-header.fr-px-2w.fr-pt-2w.fr-mb-0
+      %span.fr-icon-info-line{ aria: { hidden: true } }
+        Des macros ? Lisez la
+        = link_to('doc', t('.macros_doc.url'),
+          title: t('.macros_doc.title'),
+          **external_link_attributes)
+
   - menu.with_button_inner_html do
     = @count.nil? ? t(".download_all") : t(".download", count: @count)
   - exports.each do |item|