Existence of a resource directory in project root breaks `dinghy run` for iOS simulator

[simlay]

cargo dinghy --platform auto-ios-aarch64-sim run --example foo where foo is an example. This is a relatively nuanced use of dinghy but I was trying to run an example on an iOS device in a project that has a resources directory and this causes the xcrun simctl install ... for unclear reasons.

The "fix" is to rm the resources directory in the Dinghy.app directory and then install it.

Obviously, using dinghy for CI is much more important but having it work on examples is also quite nice.