Display scope inlay hints after closing brace for more types of blocks

Currently fn and mod are supported, but it would be nice if things like loop, while (+let), if (+let), let+else, match + block arms, etc were also supported.

On a side note, async fn's should show async fn

[crsche]

Hey, could I take a crack at implementing this?

[Veykril]

Go ahead!

[crsche]

How should conditionals be handled? Should the hint be inlaid after each branch or just after the end?

After each:

[ChayimFriedman2]

@crsche The recommended rustfmt style is to put the else on the same line, so it doesn't matter usually.

[Veykril]

I think we should probably omit them if something follows the closing brace? Also I just realized how confusing these look as one could interpret them as being implicit code in this position (which they aren't, unlike most of our other hints). I never noticed this as I am no longer using them myself. We might want to have some special disambiguator at the front to mark that?

[crsche]

That seems like the best approach, maybe something like a pipe character to explicitly separate?

[crsche]

Also, for conditionals, where should hints jump?

//v   v         v, etc?
if let Some(x) = Some(1) {
    ..
}

[Veykril]

Either to the if or the start of the condition, depends on where the other jump to. If they all jump to the start of the block like thing we should oth esame here

[markmurphydev]

@crsche Are you still working on this? If not, I'll give it a go.