Updated 3 more examples to TypeScript. Changes to individual examples
pushed as separate commits.
- Swapped `cxs/lite` for `cxs`, as it's the only mode supported by
`@types/cxs`.
## Documentation / Examples
- [X] Make sure the linting passes by running `pnpm build && pnpm lint`
- [X] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
Adding an example with [cssed](https://github.com/okotoki/cssed). A custom styling solution, which extracts CSS from template literals into separate files.