fix: files in sub folders of 'data' are not displayed (#241)

.changeset/good-oranges-cover.md

...ates/components/llamaindex/typescript/streaming/events.ts

templates/components/loaders/python/file.py

templates/types/streaming/fastapi/app/api/routers/models.py

templates/types/streaming/fastapi/app/config.py

templates/types/streaming/fastapi/main.py

...s/types/streaming/nextjs/app/api/files/[...slug]/route.ts