fix: Prevent inlay hints from flickering while typing

[Aditya-PS-05]

closes #21091

Inlay hints were rapidly appearing and hiding while typing, making code unable to read. I moved the inlay hint refresh logic to trigger when the system becomes quiescent.

[ChayimFriedman2]

This shouldn't be the correct things to do. AFAIK that means we won't refresh inlay hints on changes, unless the quiescence status was changed.

But I'm not an expert in this part of the codebase, so I'll let someone else review it.

[Veykril]

Inlay hints were rapidly appearing and hiding while typing,

Curious in which editor you observe this. Zed handles this fine, and in VSCode this works as well from what I recall.

[Aditya-PS-05]

Inlay hints were rapidly appearing and hiding while typing,

Curious in which editor you observe this. Zed handles this fine, and in VSCode this works as well from what I recall.

I just tried to reproduce the original issue #21091 and when the inlay hints are longer is size, and we make some wrong changes, the inlay hints suddenly disappear making it harder to focus on writing.

[Veykril]

I don't see how this change will fix that. It seems more like a vscode bug to me as the change here will just make us not refresh inlay hints at all in other files (which we need to do given how rust works)

[Veykril]

So I'd recommend reporting this to VSCode as that sounds like a regression on their part

[Aditya-PS-05]

@Veykril sure