test: add sol! test case

[mattsse]

add test case for foundry-rs/foundry#11177

this at least works with raw sol! solidity, only from json abi is the issue

[DaniPopes]

The equivalent is

sol! {
    interface IExampleContractEvents {
        struct SomeEventData {
            address sender;
            address receiver;
        }
    }
    interface IExampleContract {
        event SomeEvent(IExampleContractEvents.SomeEventData eventData);
    }
}