fix: update llamaindex, use 127.0.0.1 for ollama as default

helpers/env-variables.ts

helpers/proxy.ts

templates/types/streaming/express/package.json

...ypes/streaming/express/src/controllers/engine/settings.ts

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

...es/types/streaming/nextjs/app/api/chat/engine/settings.ts

templates/types/streaming/nextjs/package.json