Merge branch 'federation-scanning' into 'develop'

api/funkwhale_api/federation/api_serializers.py

api/funkwhale_api/federation/api_views.py

api/funkwhale_api/federation/library.py

api/funkwhale_api/federation/routes.py

api/funkwhale_api/federation/serializers.py

api/funkwhale_api/federation/views.py

api/funkwhale_api/music/admin.py

api/funkwhale_api/music/models.py

api/funkwhale_api/music/tasks.py

api/tests/conftest.py

api/tests/federation/test_api_serializers.py

api/tests/federation/test_api_views.py

api/tests/federation/test_routes.py

api/tests/federation/test_serializers.py

api/tests/federation/test_views.py

api/tests/music/test_models.py

api/tests/music/test_tasks.py

api/tests/test_downloader.py

front/src/views/content/remote/Card.vue

front/src/views/content/remote/Home.vue