feat: Add llama-agent template (#150)

.changeset/shy-horses-think.md

helpers/env-variables.ts

helpers/index.ts

helpers/python.ts

helpers/types.ts

questions.ts

templates/components/settings/python/llmhub.py

templates/components/settings/python/settings.py

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

templates/types/multiagent/fastapi/app/agents/dummy/agent.py

...types/multiagent/fastapi/app/agents/query_engine/agent.py

templates/types/multiagent/fastapi/app/core/control_plane.py

templates/types/multiagent/fastapi/app/core/message_queue.py

templates/types/multiagent/fastapi/app/core/task_result.py

templates/types/multiagent/fastapi/app/utils.py

templates/types/multiagent/fastapi/main.py

templates/types/multiagent/fastapi/pyproject.toml