Add support for debugging and testing python in gitpod

.gitignore

.gitpod.yml

.gitpod/Dockerfile

.gitpod/create_library.py

.gitpod/docker-compose.yml

.gitpod/gitpod.env

.gitpod/init_actor.py

.vscode/launch.json

.vscode/settings.json

api/funkwhale_api/common/management/commands/gitpod.py

api/funkwhale_api/music/management/commands/import_files.py

api/poetry.lock

api/pyproject.toml

changes/changelog.d/1875.enchancement