internal: add some `tracing` to {Request, Notification}Dispatch
Some of the tracing config would need to be changed in order to benefit more from this (especially `.with_span_events(FmtSpan::CLOSE)`), which provides span events like the following:
```
2024-01-18T02:41:06.675779Z INFO request{method="textDocument/codeLens" request_id=RequestId(I32(17))}: rust_analyzer::dispatch: close time.busy=61.8µs time.idle=5.29µs
```
I dunno if y'all need `LoggerFormatter` in here, but if you don't, I'd be happy to yeet it out of rust-analyzer. In any case, this provided a pretty decent amount of information in the logs, and I can expand this as needed or we can land this PR and expand later.
This commit also adds `tracing` to NotificationDispatcher/RequestDispatcher,
bumps `rust-analyzer-salsa` to 0.17.0-pre.6, `always-assert` to 0.2, and
removes the homegrown `hprof` implementation in favor of a vendored
tracing-span-tree.
feat: "Normalize import" assist and utilities for normalizing use trees
- Add import/use tree normalization utilities
- Add "normalize import" assist
- Update "merge imports" assist to always apply to the covering use item except for nested use tree selections
- Update "merge imports" assist to avoid adding unnecessary braces when merging nested use tree selections
See [this discussion](https://github.com/rust-lang/rust-analyzer/pull/16372#discussion_r1457244321) for the motivation for the new "normalize import" assist and changes to the "merge imports" assist.
feat: Support for GOTO def from *inside* files included with include! macro
close#14937
Try to implement goto def from *inside* files included with include! macro.
This implementation has two limitations:
1. Only **one** file which calls include! will be tracked. (I think multiple file be included is a rare case and we may let it go for now)
2. Mapping token from included file to macro call file (semantics.rs:646~658) works fine but I am not sure is this the correct way to implement.
Use upstream exhaustiveness checker!
Because it has been librarified!
The extra `Apache-2.0 WITH LLVM-exception` license is for `rustc_apfloat`. Also this duplicates `rustc_index` because the other upstream deps are still on an earlier version. They should be bumpable now though. Good thing is that we don't need this new crate to be synchronized with the others, which will make our lives easier.
