### Background
T291304 simplified and reduced the number of nav landmarks in modern Vector, which removed landmarks that were poorly named or didn't contain enough links. This reduces the overhead for new screenreader users to learn navigation on the site by reducing the number of navigation options.
However, there were [[ https://phabricator.wikimedia.org/T291304#8078998 | concerns ]] around how could impact existing screenreaders users who would have to learn these changes. This task is for restoring some of the original landmarks, which will likely be subject to change in the future with the navigation restructure epic anyway.
Currently:
{F35515262}
Proposed:
{F35515268}
The proposed change restores the "namespaces", "views" and "more options" landmarks.
### AC
[] The "tools" navigation landmark is replaced with "namespaces", "views" and "more options"
[] No visual changes
### Developer notes
Given this is likely temporary until the navigation restructure work, the landmarks can be added manually in the ArticleToolbar.mustache template, by wrapping the Menu template with a <nav> element.
To note, in legacy Vector the "language variants" dropdown had it's own nav landmark. In this task we will still be merging it into "namespaces" for the following reasons:
1. Language variants isn't on all wikis, its relatively lower impact
2. It only contains 1 dropdown, so it probably doesn't deserve it's own landmark to begin with
3. It will likely be moved/reworked along with the entire page toolbar in the navigation restructure work