Typescript Documentation Improvement for Persistent Layouts (#33659)
Typescript Documentation Improvement for Persistent Layouts (#33659)

By making `NextPageWithLayout` generic and passing the type parameters to `NextPage`, our pages can continue to specify the props explicitly. This gives us type safety in `getInitialProps`, for example.

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [x] Make sure the linting passes by running `yarn lint`

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