feat: use llamacloud pipeline for private files and generate script in Python (#226)

.changeset/plenty-beers-cheer.md

helpers/index.ts

helpers/python.ts

...lates/components/sample-projects/llamapack/pyproject.toml

templates/components/vectordbs/python/llamacloud/generate.py

templates/components/vectordbs/python/llamacloud/index.py

...es/components/vectordbs/python/llamacloud/query_filter.py

templates/components/vectordbs/python/llamacloud/service.py

templates/types/extractor/fastapi/pyproject.toml

...reaming/express/src/controllers/chat-upload.controller.ts

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

...es/types/streaming/fastapi/app/api/routers/chat_config.py

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

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

templates/types/streaming/fastapi/app/api/services/file.py

templates/types/streaming/fastapi/pyproject.toml

...lates/types/streaming/nextjs/app/api/chat/upload/route.ts

...es/types/streaming/nextjs/app/components/chat-section.tsx

...es/streaming/nextjs/app/components/ui/chat/chat-input.tsx

...streaming/nextjs/app/components/ui/chat/hooks/use-file.ts