examples(with-nestjs): Add missing eslint devDependency (#11138)
### Description
Adds `eslint` as a devDependency to the `with-nestjs` example's API
package.
The API package in the with-nestjs example uses ESLint for linting but
was missing it in `devDependencies`. This could cause issues for users
trying to run
the example, as ESLint-related scripts or configurations would fail
without the dependency installed.
**Changes:**
- Added `eslint: ^9.31.0` to `devDependencies` in
`examples/with-nestjs/apps/api/package.json`
**AS-IS**
<img width="611" height="347" alt="스크린샷 2025-11-19 오후 12 25 08"
src="https://github.com/user-attachments/assets/a5d2f638-0e41-42a1-aadb-7e09412d8faa"
/>
