Merge branch 'main' into 'backend_frontend_sync'

FullstackProsjekt/src/frontend/src/assets/main.css

FullstackProsjekt/src/frontend/src/components/TheWelcome.vue

...jekt/src/frontend/src/components/icons/default-avatar.svg

...kt/src/frontend/src/components/shared/sidebar/Sidebar.vue

...rc/frontend/src/components/shared/sidebar/SidebarLink.vue

FullstackProsjekt/src/frontend/src/router/index.js

FullstackProsjekt/src/frontend/src/views/NewQuizView.vue

...stackProsjekt/src/frontend/src/views/OverviewQuizView.vue

FullstackProsjekt/src/frontend/src/views/ProfileView.vue