Refactor query engine tool code and use auto_routed mode for LlamaCloudIndex (#450)

.changeset/twenty-snakes-play.md

helpers/python.ts

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

...python/financial_report/app/workflows/financial_report.py

.../agents/python/form_filling/app/workflows/form_filling.py

...ates/components/agents/typescript/blog/workflow/agents.ts

...ts/agents/typescript/financial_report/workflow/factory.ts

...agents/typescript/financial_report/workflow/fin-report.ts

...onents/agents/typescript/form_filling/workflow/factory.ts

...s/agents/typescript/form_filling/workflow/form-filling.ts

templates/components/engines/python/agent/engine.py

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

templates/components/engines/python/chat/engine.py

templates/components/engines/typescript/agent/chat.ts

...components/engines/typescript/agent/tools/query-engine.ts

...ates/components/multiagent/python/app/api/routers/chat.py

templates/components/multiagent/typescript/workflow/tools.ts