feat(examples): Defer x Next.js

[charlypoly]

Defer is a platform that enables hundreds of Next.js developers to perform long-running operations and build LLM applications by scheduling work with our Scheduler. This example compounds our recent Vercel Integration release.

Checklist

• [x] The "examples guidelines" are followed from our contributing doc https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md

• [x] Make sure the linting passes by running pnpm build && pnpm lint. See https://github.com/vercel/next.js/blob/canary/contributing/repository/linting.md

[ijjk]

Allow CI Workflow Run

• [ ] approve CI run for commit: 0551767ce39dab9103d1da2c57a5d72b1c0a29ae

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• [ ] approve CI run for commit: 0551767ce39dab9103d1da2c57a5d72b1c0a29ae

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer