implement-parse-listlisted

<!-- vigiles:result "npm test" --> # Implement parseList Implement a function `parseList(input)` in `src/parse.js` and export it as a named ESM export. It takes a comma-separated string and returns the list of items: - Split the input on commas. - Trim surrounding whitespace from each item. The module must be importable as `parseList` from `src/parse.js`. The behaviour is covered by the tests under `test/`.