feat: Add more. env variables to config host, port, llm and embedding (#630)

helpers/env-variables.ts

helpers/index.ts

helpers/typescript.ts

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

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

templates/components/loaders/python/llama_parse/loader.py

templates/types/simple/fastapi/app/settings.py

templates/types/simple/fastapi/main.py

templates/types/streaming/fastapi/app/settings.py

templates/types/streaming/fastapi/main.py