properly implement ListEntry component

[bravegrumpy]

<!--TODO: properly implement this!-->

In file src/lib/components/List/ListEntry.svelte

bravegrumpy.website/src/lib/components/List/ListEntry.svelte

Line 47 in fed1c06

{:else}

[bravegrumpy]

• Copy the {#snippet entry()} component defined in $lib/components/List/ListOfLinks.svelte file.

• Translate it from a Snippet definition to a full component.

• Allow more than just strings in the "sublist" prop.