Record fields hover

[FMorschel]

Consider:

void foo((String, {int value}) r, {int? other}) {
  r.$1;
  r.value;
  var (v, :value) = r;
  foo((v, value: value), other: 0);
}

See the available hover data:

Considering parameters:

The record pattern name is the same as above:

But when filling in the record for a parameter like this, nothing shows:

I'm suggesting we have some indication for the user of what type is expected at this value. And maybe enhancing the other hovers for getters.

Somewhat related to:

• Doc comments in typedefs for record types can't reference field names #60332
• Record Fields & Comment References #60452
• Rename(refactor) support for record's named fields #53024