Add a new field to allow a configurable number of items and a "show more" button

e.g. show 6 council services and then a 'show more' button to show the rest of them, or show 3 news items initially

<img width="1179" height="670" alt="Image" src="https://github.com/user-attachments/assets/d8e184c1-4e5a-401b-bfb3-af574d888fac" />
<img width="1213" height="933" alt="Image" src="https://github.com/user-attachments/assets/0c2769bf-6af2-461c-a6fb-946f5de6c8e6" />