Unhelpful hover information for list literals

When hovering on records, the language server usually provides useful details.
Unfortunately, because list literals are immediately desugared into applications of `Cons` and `Nil`,
the language server shows details about `Cons` or `Nil` on hover:


Sometimes the displayed information is for `Cons` no matter to which point of the list literal one points,
in other cases, the displayed information is for `Nil`.

The code handling for showing hover information is here:
https://github.com/effekt-lang/effekt/blob/master/effekt/shared/src/main/scala/effekt/Intelligence.scala#L144-L150