Add support for folder-based Xcode projects

[philprime]

The Xcode project file format changed and the detection of the file to inject the code snippet fails.

This is most likely due to the xcodes dependency not being actively maintained. We should test this and implement proper parsing to fix the snippet injection.

Steps to reproduce

• Create a sample Xcode project named something like this-is-an-app
• Run the sentry-wizard to setup the project
• Note this log message:

Added the Sentry dependency to your project but could not add the Sentry code snippet.