cargo-hack compatibility

[joshka]

Cargo-hack runs a cargo command against various combinations of features (at its simplest, --each-feature). When the output of this is displayed in bacon, the context of which package is being run is lost. E.g.:

The output header above each run is like:

info: running `cargo test --all-features` on ratatui (1/32)

I'm not sure what's best to do here, either grouping or dedupe both seem like rational ideas.