feat(create-llama) add folder selection & support more context data types (#489)

.changeset/honest-dragons-cough.md

packages/create-llama/helpers/index.ts

packages/create-llama/helpers/python.ts

packages/create-llama/helpers/types.ts

packages/create-llama/index.ts

packages/create-llama/questions.ts

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

...te-llama/templates/types/streaming/fastapi/pyproject.toml