Implement inlay hint location links

[Veykril]

The inlay hint api allows to split the hints into parts backed by links, we should make use of this.

https://github.com/rust-analyzer/rust-analyzer/blob/5e8515870674983cce5b945946045bc1e9b80200/crates/rust-analyzer/src/lsp_ext.rs#L273-L283

The main difficulty here is that we currently use HirDisplay to render the display representation of types which doesn't allow introspection into each part. We probably need a proper type visitor api here.

[IWANABETHATGUY]

Hi, since this pr has been landed for a while, what is the progress of go to type definition via a inlayHint

[bigdogs]

Hi, Any new progress for this issue?
BTW. Is this related to the issue that inlay hint tooltip window is not show up ?

[IWANABETHATGUY]

@Veykril , I would like to have a try, would you mind give me some hints?

[Veykril]

I'm not sure. as was said in the initial description, we probably need to come up with a proper type visitor API here so we can construct the inlay hint parts correctly. I am not sure how feasible that is yet.