grind
This PR improves `grind` error and trace messages by cleaning up local declaration names.
This PR adds "performance" counters (e.g., number of instances per theorem) to `grind`. The counters are always reported on failures, and on successes when `set_option diagnostics true`.
simp
This PR adds `simp`-like parameters to `grind`, and `grind only` similar to `simp only`.