Add link to Events page on translate.wordpress.org

[trymebytes]

There's no link to the Events page on translate.wordpress.org, we would need to address this in another PR.
Where should it be placed, below is a screenshot of the landing page - translate.wordpress.org and a suggestion of where to put the link.

On other pages, we could have it here(see below);

[amieiro]

When we release the Event plugin at translate.w.org, we can add the link here.

For this image, we need to add it in a regular WordPress menu.