add llama nextjs simple template

README.md

create-app.ts

helpers/examples.ts

index.ts

package.json

templates/index.ts

templates/simple/nextjs/.env.example

templates/simple/nextjs/README-template.md

templates/simple/nextjs/app/api/route/llm.ts

templates/simple/nextjs/app/favicon.ico

templates/simple/nextjs/app/globals.css

templates/simple/nextjs/app/layout.tsx

templates/simple/nextjs/app/page.tsx

templates/simple/nextjs/eslintrc.json

templates/simple/nextjs/gitignore

templates/simple/nextjs/next-env.d.ts

templates/simple/nextjs/next.config.js

templates/simple/nextjs/postcss.config.js

templates/simple/nextjs/public/next.svg

templates/simple/nextjs/public/vercel.svg