feat: Add form filling use case for Python (#403)

.changeset/large-parents-exercise.md

helpers/tools.ts

helpers/types.ts

questions/questions.ts

questions/simple.ts

...tes/components/agents/python/blog/app/agents/publisher.py

...es/components/agents/python/blog/app/agents/researcher.py

...ents/agents/python/financial_report/app/agents/analyst.py

...nts/agents/python/financial_report/app/agents/reporter.py

.../components/agents/python/form_filling/README-template.md

...nts/agents/python/form_filling/app/agents/form_filling.py

...omponents/agents/python/form_filling/app/engine/engine.py

...omponents/agents/python/form_filling/sec_10k_template.csv

templates/components/engines/python/agent/tools/__init__.py

...tes/components/engines/python/agent/tools/form_filling.py

...ents/multiagent/python/app/api/routers/vercel_response.py

...ates/components/multiagent/python/app/workflows/single.py

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

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

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