Improving the Contributions page

Provide a quick way to to start an article, upload a file or create a translation. This is an iteration on the previous design in which issues were identified. Those are explained in T88586.

Check this prototype to get an idea.
Acceptance criteria:

1. A new "New contribution" section is added above the existing "User contributions" section.
2. Three buttons are provided for creating an article, uploading media, and access the translation dashboard (this will replace the current drop-down menu).
   1. Article creation action should be labeled as "new page" (this doesn't match the prototype) and link to some place where users can start a new article. One option is the wanted pages list, but we may find a better place.
   2. "Upload media" links to the upload wizard.
   3. "Translate" links to the Content Translation Dashboard (showing the suggestions panel if that exists).
3. Each button may have a blue highlighted corner when there is an event worth highlighting (in the prototype it is shown for "translate"):
   1. At the moment, it will be present for the "translate" button the first time the user views this component (to communicate that there is a new way to contribute), only the first time.
4. Each button will have a corresponding tooltip on hover that will provide more details on the actions.