feat: Add template for structured extraction (#185)

.changeset/proud-seals-yell.md

helpers/index.ts

helpers/types.ts

questions.ts

templates/types/extractor/fastapi/README-template.md

templates/types/extractor/fastapi/app/__init__.py

templates/types/extractor/fastapi/app/api/__init__.py

...lates/types/extractor/fastapi/app/api/routers/__init__.py

...ates/types/extractor/fastapi/app/api/routers/extractor.py

templates/types/extractor/fastapi/app/api/routers/output.py

templates/types/extractor/fastapi/main.py

templates/types/extractor/fastapi/pyproject.toml

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