Add "error" pattern

Hi, thanks for your proposal.

I am not very comfortable about a component without any specific markup, being built with styles utilities classes and the layout system: https://git.drupalcode.org/project/ui_suite_dsfr/-/blob/e412e48eaecda579...

I need to think about that.

Let's implement theme as examples for now.

The error pages are no more presented as beta features but are now included as models. See https://www.systeme-de-design.gouv.fr/composants-et-modeles/modeles/page... for further evolutions.

Hi @pdureau!
I'm sorry I came back after so long.
For this issue I only updated my MR to add a "pictogram" settings.
This pattern has been very useful inside our projects up to now and I have trouble understanding how an example could be more useful to our developers?

hi Sorya,

When I see the wrapper element, I am still not convinced about this to be a genuine component:

<div class="fr-grid-row fr-grid-row--gutters fr-grid-row--middle fr-grid-row--center fr-my-3w">

Also, there are some issues:

• the attributes object is not used
• Some paths are hardcoded: <use class="fr-artwork-motif" href="/libraries/dsfr/dist/artwork/background/ovoid.svg#artwork-motif"></use>. Maybe the upcoming https://www.drupal.org/project/ui_icons → may help here

So, from https://www.systeme-de-design.gouv.fr/composants-et-modeles/modeles/page... :

• Erreur 404, Page non trouvée: Can be done directly in Drupal templates: page--404.html.twig. See: https://www.drupal.org/node/2960810 →
• Erreur 500, Erreur inattendue: We may need hook_theme_suggestions_page_alter: https://www.drupal.org/forum/support/module-development-and-code-questio... →
• Erreur 503, Service indisponible: We may need hook_theme_suggestions_page_alter: https://www.drupal.org/forum/support/module-development-and-code-questio... →

Anyway, moved to 1.1.x because all those pages rely heavily on pictograms (<svg class="fr-artwork">), which will be implemented with UI Icons.