feat: use poetry run generate (#41)

.changeset/four-tools-buy.md

README.md

helpers/index.ts

helpers/typescript.ts

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

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

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

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

templates/components/vectordbs/python/none/generate.py

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

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

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

templates/types/streaming/fastapi/pyproject.toml