kai hiroi

I think the transient storage context should be split by default for each top-level call in the Foundry test runner. Also, I would like transient storage to be cleared when...

Through [this comment](https://github.com/foundry-rs/foundry/issues/8165#issuecomment-2168416043), I learned that running tests with the `--isolate` option allows the top-level call to be executed as a context-independent tx.