### Description As far as I can tell, the [docs](https://developer.apple.com/documentation/testing) don't explain how one should add resources that might be needed for unit tests, like test data files. ### Expected behavior A section showing how where to add test resources ### Actual behavior _No response_ ### Steps to reproduce _No response_ ### swift-testing version/commit hash _No response_ ### Swift & OS version (output of `swift --version && uname -a`) _No response_