Describe the feature

Alongside the <Listbox> control, I think it would be nice if Reka UI has primitives around grids.

<template>
  <Gridbox.Root>
    <Gridbox.Filter />

    <Gridbox.Content :columns="3">
      <Gridbox.Item>
        <Gridbox.ItemIndicator />
      </Gridbox.Item>
    </Gridbox.Content>
  </Gridbox.Root>
</template>

Grids are very simple (so long as you know the amount of columns), but I think they can still be prone, so it seems worthwhile that Reka UI implements it.

Related: https://next.melt-ui.com/components/spatialmenu/ (although calling it "spatial" feels wrong, grids are inherently much simpler than the spatial navigation that console/TV interfaces have)

Additional information

• I intend to submit a PR for this feature.
• I have already implemented and/or tested this feature.