Xcode generated project/workspace files have no warnings

Gradle generates project/workspace files that contain warnings when opened.

### Expected Behavior
No warning should be present on freshly generated project/workspace files. See [this blog post](https://lapcatsoftware.com/articles/validate-project-settings-never.html) for a possible solution.

### Test Cases
Haven't found any way to automate this process.

Start by reproducing the issue with freshly generated Gradle project/workspace files and opening them in Xcode; compare the warnings with the linked blog post's possible solution. The issue names no repository files or automated tests, so done means freshly generated files open without warnings and a practical validation approach is documented or added.

Written by the indexing model from the issue text.