added first draft of streaming nextjs template

...ages/create-llama/templates/streaming/nextjs/.env.example

...reate-llama/templates/streaming/nextjs/README-template.md

...te-llama/templates/streaming/nextjs/app/api/chat/route.ts

...templates/streaming/nextjs/app/components/chat-avatar.tsx

...emplates/streaming/nextjs/app/components/chat-history.tsx

...a/templates/streaming/nextjs/app/components/chat-item.tsx

...emplates/streaming/nextjs/app/components/chat-section.tsx

...lama/templates/streaming/nextjs/app/components/header.tsx

...emplates/streaming/nextjs/app/components/message-form.tsx

...s/create-llama/templates/streaming/nextjs/app/favicon.ico

...s/create-llama/templates/streaming/nextjs/app/globals.css

...es/create-llama/templates/streaming/nextjs/app/layout.tsx

...ages/create-llama/templates/streaming/nextjs/app/page.tsx

...ges/create-llama/templates/streaming/nextjs/eslintrc.json

packages/create-llama/templates/streaming/nextjs/gitignore

...ges/create-llama/templates/streaming/nextjs/next-env.d.ts

...es/create-llama/templates/streaming/nextjs/next.config.js

...ages/create-llama/templates/streaming/nextjs/package.json

...create-llama/templates/streaming/nextjs/postcss.config.js

.../create-llama/templates/streaming/nextjs/public/llama.png