feat: Add publisher agent, merge code with streaming template (#324)

.changeset/flat-singers-share.md

.changeset/gorgeous-penguins-shout.md

e2e/python/resolve_dependencies.spec.ts

e2e/utils.ts

helpers/env-variables.ts

helpers/python.ts

helpers/tools.ts

helpers/typescript.ts

questions.ts

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

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

...mponents/engines/python/agent/tools/document_generator.py

...lates/components/engines/python/agent/tools/duckduckgo.py

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

...ates/components/engines/python/agent/tools/interpreter.py

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

...ents/engines/typescript/agent/tools/document-generator.ts

...s/components/engines/typescript/agent/tools/duckduckgo.ts

...ates/components/engines/typescript/agent/tools/img-gen.ts

templates/components/engines/typescript/agent/tools/index.ts