Create the archi to handle the mails feature.
It has a different layout than the other features,
we don't display the sidebar to keep the
user focused on the mail content.
We have added workers to playwright to run tests in parallel,
this will help us to run tests faster.
The tests run on a commun database, so to keep the tests
stable between browsers, we created 3 different
users to run the tests, it will avoid to have commun data
stepping on each other.
