fcf15cc05a
3169: Show record field names in Enum completion r=flodiebold a=adamrk Adresses https://github.com/rust-analyzer/rust-analyzer/issues/2947. Previously the details shown when autocompleting an Enum variant would look like the variant was a tuple even if it was a record:  This change will show the names of the fields for a record and use curly braces instead of parentheses:  This required exposing the type `adt::StructKind` from `ra_hir` and adding a function ``` kind(self, db: &impl HirDatabase) -> StructKind ``` in the `impl` of `EnumVariant`. There was also a previously existing function `is_unit(self, db: &impl HirDatabase) -> bool` for `EnumVariant` which I removed because it seemed redundant after adding `kind`. Co-authored-by: adamrk <ark.email@gmail.com>
