feat: Add support for llamahub tools (#517)

.changeset/honest-schools-divide.md

packages/create-llama/create-app.ts

packages/create-llama/e2e/utils.ts

packages/create-llama/helpers/python.ts

packages/create-llama/helpers/tools.ts

packages/create-llama/helpers/types.ts

packages/create-llama/index.ts

packages/create-llama/questions.ts

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

...-llama/templates/components/engines/python/agent/tools.py

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

...lama/templates/components/vectordbs/python/mongo/index.py

...llama/templates/components/vectordbs/python/none/index.py

...e-llama/templates/components/vectordbs/python/pg/index.py

...ma/templates/types/simple/fastapi/app/api/routers/chat.py

...ama/templates/types/simple/fastapi/app/engine/__init__.py

...-llama/templates/types/simple/fastapi/app/engine/index.py

...reate-llama/templates/types/simple/fastapi/pyproject.toml

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

.../templates/types/streaming/fastapi/app/engine/__init__.py