Support DidChangeWorkspaceFolders notifications
This PR enables the `WorkspaceFoldersServerCapabilities` capability for rust-analyzer and implemented support for the associated [`DidChangeWorkspaceFolders`](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#workspace_didChangeWorkspaceFolders) notification to allow clients to update the list of `workspaceFolders` sent during initialization.
## Motivation
This allows clients which lazily autodiscover their workspace roots (like the [helix editor](https://github.com/helix-editor/helix) once [my PR](https://github.com/helix-editor/helix/pull/5748) lands) avoid spawning multiple instances of RA. Right now such clients are forced to either:
* greedily discover all LSP roots in the workspace (precludes the ability to respond to new workspace roots)
* spawn multiple instance of rust-analyzer (one for each root)
* restart rust-analyzer whenever a new workspace is added
Some example use-cases are shown [here](https://github.com/helix-editor/helix/pull/5748#issuecomment-1421012523).
This PR will also improve support for VSCode (and Atom) multi workspaces.
## Implementation
The implementation was fairly straightforward as `rust-analyzer` already supports dynamically reloading workspaces, for example on configuration changes. Furthermore, rust-analyzer also already supports auto-discovering internal workspace from the `workspaceFolders` key in the initialization request. Therefore, the necessary logic just needed to be moved to a central place and reused.
Handle case when BlockExpr is child of IfExpr, WhileExpr, LoopExpr,
ForExpr.
An additional { } will be added when:
- It is not a BlockExpr
- It is a BlockExpr and a child of IfExpr, WhileExpr, LoopExpr, ForExpr.
Support sysroot library source being defined inside the workspace
With this you can now specify `cargo.sysrootSrc`. This is required for the rust workspace such that the `library` folder inside the workspace can be used as the sysroot library sources. We now also recognize if these sources are inside the workspace, tagging the as workspace members.
This does duplicate the sysroot crates still, but I don't think that causes too many problems.
fix: Don't panic on broken syntax trees in adjustment inlay hints
These should be unreachable, but apparently with broken enough syntax trees (I assume mismatched parens), we do reach these unreachable calls. Haven't quite figured out when this happens though.
fix: consider relative offset to fake ident token in expansion for completion
Fixes#13836
When we check if the offset of fake ident token is out of bounds in the "actual expansion" (i.e. expansion without the fake ident token), we should take relative offset to it into account to match [how we'd get token after expansion](f1b257f4eb/crates/ide-completion/src/context/analysis.rs (L53-L54)).
