Component feature request: footer with border and column-layout

[AlineNap]

Please add tokens to be able to place a border at the top of the page footer and to add a column layout. The following tokens are involved:

• utrecht.page-footer.border-color
• utrecht.page-footer.border-width
• utrecht.page-footer.content.column-gap
• utrecht.page-footer.content.max-inline-size
• utrecht.page-footer.content.column-width
• utrecht.page-footer.content.row-gap

During the RHC sprint planning on October 2nd, Robbert confirmed that this can be added to the Utrecht code.

[AlineNap]

Zie meer info in ticket van RHC: nl-design-system/rijkshuisstijl-community#727
En het design voor lux (mijn aansluitingen) hier: https://www.figma.com/design/jzxqJv4PtgHJdmOJwY6lYg/NLDS---Bibliotheek---LUX-tokens?node-id=15613-2989

[Robbert]

Voorbeeld:

.utrecht-page-footer__content {
  --utrecht-column-layout-column-gap: var(--utrecht-page-footer-content-column-gap);
  display: flex;
  column-gap: var(--utrecht-page-footer-content-column-gap);
}