How should Knip be configured so that @rstest/coverage-istanbul is correctly recognized

[sheepzh]

因为 rstest 跑 coverage 的时候会自动加载这个 dependency，导致跑 knip 任务的时候不能正确识别

[chenjiahan]

This issue should probably be fixed on Knip's side: https://knip.dev/reference/plugins/rstest