Improve landmarks on the Project dashboard and Editor pages (#26751)

* Improve landmarks for the Project Dasbhboard

* Improve landmarks for the IDE page

* Improve landmarks for the new redesigned IDE page

* Sort locales

* Fix typo OlButtonToolbar -> OLButtonToolbar

* Update project navbar translation

* Update labels

* Redundant main landmark

* Fix failing test

* Descriptive name for the rails tab

* Header should not be in a button

* Update translation to Account and help

* Update translation to Project categories and tags

* Add explanations

GitOrigin-RevId: 96712b37bb1306b552de510d9fd8ae890f24309f

services/web/frontend/js/features/chat/components/chat-pane.tsx

@@ -72,7 +72,7 @@ const ChatPane = React.memo(function ChatPane() {
   }
 
   return (
-    <aside className="chat">
+    <aside className="chat" aria-label={t('chat')}>
       <InfiniteScroll
         atEnd={atEnd}
         className="messages"