This adds `./script/cargo` which is a transparent wrapper around `cargo`
intended for use by internal staff members at Zed.
It:
- adds `--timings` to `cargo build`/`cargo test`/`cargo run`
- saves the output to ZED_DATA_DIR/build-timings
When Zed starts (and you're logged in as a staff member) the
build-timings
directory is uploaded to our existing telemetry stack.
Co-authored-by: Marshall <git@maxdeviant.com>
Release Notes:
- N/A
