10798: ide: show go to for function hover return type r=Veykril a=jhgg
I've found myself wanting this... adds to the hover quick go-to for a function's return type:

This is particularly useful when you are hovering over a function in a long chain, like:
```rust
foo.bar().b$0az().some_trait_fn();
```
where `baz`'s return type is not immediately obvious, but the chain is not long enough to trigger chain inlay hints...
i guess I could just select `foo.bar().baz()` too to get the types too...
Co-authored-by: Jake Heinz <jh@discordapp.com>
10563: feat: Make "Generate getter" assist use semantic info r=agluszak a=agluszak
This PR makes "Generate getter" assist use semantic info instead of dealing with types encoded as strings.
Getters for types which are:
- `Copy` no longer return references
- `AsRef<str>` (i.e. `String`) return `&str` (instead of `&String`)
- `AsRef<[T]>` (i.e. `Vec<T>`) return `&[T]` (instead of `&Vec<T>`)
- `AsRef<T>` (i.e. `Box<T>`) return `&T` (instead of `&Box<T>`)
- `Option<T>` return `Option<&T>` (instead of `&Option<T>`)
- `Result<T, E>` return `Result<&T, &E>` (instead of `&Result<T, E>`)
String, Vec, Box and Option were previously handled as special cases.
Closes#10295
Co-authored-by: Andrzej Głuszak <gluszak.andrzej@gmail.com>