feat: add streaming express example and align with non-streaming one

packages/create-llama/templates/index.ts

.../create-llama/templates/simple/express/README-template.md

packages/create-llama/templates/simple/express/index.ts

packages/create-llama/templates/simple/express/package.json

...mplates/simple/express/src/controllers/chat.controller.ts

...e-llama/templates/simple/express/src/routes/chat.route.ts

packages/create-llama/templates/simple/express/tsconfig.json

...eate-llama/templates/streaming/express/README-template.md

...es/create-llama/templates/streaming/express/eslintrc.json

packages/create-llama/templates/streaming/express/index.ts

...ges/create-llama/templates/streaming/express/package.json

...ates/streaming/express/src/controllers/chat.controller.ts

...es/streaming/express/src/controllers/llamaindex-stream.ts

...lama/templates/streaming/express/src/routes/chat.route.ts

...es/create-llama/templates/streaming/express/tsconfig.json