Merge branch 'missing-localization' into 'develop'

front/locales/app.pot

front/locales/en_US/LC_MESSAGES/app.po

front/locales/fr_FR/LC_MESSAGES/app.po

front/scripts/i18n-extract.sh

front/src/App.vue

front/src/components/About.vue

front/src/components/Home.vue

front/src/components/PageNotFound.vue

front/src/components/Sidebar.vue

front/src/components/admin/SettingsGroup.vue

front/src/components/audio/PlayButton.vue

front/src/components/audio/Search.vue

front/src/components/audio/album/Card.vue

front/src/components/audio/artist/Card.vue

front/src/components/audio/track/Table.vue

front/src/components/auth/Login.vue

front/src/components/auth/Logout.vue

front/src/components/auth/Profile.vue

front/src/components/auth/Settings.vue

front/src/components/auth/Signup.vue