Implement initial Profile Page UI (#12)

routing/routes/routes.yml

src/Http/Controllers/User/Profile.php

templates/base.twig

templates/includes/_header.twig

templates/includes/_js-accordion.twig

templates/includes/_navigation.twig

templates/test.twig

templates/user/activity.twig

templates/user/activity.twig.bak

templates/user/connected-organizations.twig

templates/user/connected-organizations.twig.bak

templates/user/personal-data.twig

templates/user/personal-data.twig.bak

www/assets/css/src/default.css