pub fn find_rust_analyzer() -> Result<PathBuf>Expand description
Locates the rust-analyzer binary.
It first searches the system PATH env variable using the system which utility.
If missing, it attempts to fall back to the active toolchain’s binary directory
using rustup which rust-analyzer.
§Errors
Returns an error if rust-analyzer cannot be found via either mechanism,
providing user-friendly instructions on how to install it.