[Olivero Theme]: Theme 404 "Page not found" and 403 "Forbidden/Access denied" pages

I have addressed all the feedback from #55. I have added an interdiff as well as patch for same. please review.

The last submitted patch, 58: 3182242-58.patch, failed testing. View results →

Seems all points have been addressed.

The last submitted patch, 58: 3182242-58.patch, failed testing. View results →

Restoring status

1. +++ b/core/themes/olivero/css/components/page-error.pcss.css
   @@ -0,0 +1,42 @@
   +.page-error-content__image--404 svg {
   ...
   +.page-error-content__image--403 svg {
   

   Should we provide some attributes in the svgs that allow us to target them specifically?

2. +++ b/core/themes/olivero/images/403.svg
   @@ -0,0 +1,4 @@
   +<svg xmlns="http://www.w3.org/2000/svg" width="602.4" height="283" viewBox="0 0 602.4 283" aria-labelledby="403Title 403Desc">
   
   +++ b/core/themes/olivero/images/404.svg
   @@ -0,0 +1,4 @@
   +<svg xmlns="http://www.w3.org/2000/svg" width="637.6" height="283" viewBox="0 0 637.6 283" aria-labelledby="404Title 404Desc">
   

   Not sure what the aria-labelledby is intended to reference 🤔

3. +++ b/core/themes/olivero/olivero.theme
   @@ -607,6 +607,34 @@ function olivero_preprocess_table(&$variables) {
   +function olivero_preprocess_page(&$variables) {
   

   What's happening in this preprocess seems almost too smart 😅 Wondering if this would be simpler if we just used the theme suggestions for 403 and 404?

4. +++ b/core/themes/olivero/olivero.theme
   @@ -607,6 +607,34 @@ function olivero_preprocess_table(&$variables) {
   +      'system.404' => t('Looks like we can’t seem to find what you’re looking for. Sorry about that!'),
   

   I'm not sure we should be sorry if the page user was looking for was not found 🤔 That's also something that our interface text documentations advices us to avoid: https://www.drupal.org/docs/develop/user-interface-standards/interface-t... → .