Migrate Xcode project to use Folders instead of Groups

[Supereg]

Migrate Xcode project to use Folders instead of Groups

♻️ Current situation & Problem

This PR migrates the Xcode project file to use Folders instead of the Groups. Refer to Convert groups to folders to learn everything about the conversion and why folders are better and groups. The main benefits: a) we don't incur any merge conflicts as files no longer are tracked in the Xcode project file and b) everything is exactly as on the file system creating less confusion and creating a similar development experience as with Swift Packages.

Overall, this should help especially people new to Xcode to have way less problems start off with iOS development.

Note that all the .license files e.g. in the Resources folder are now also part of the project and distributed with the app which, in my opinion, isn't even a bad side effect and also helps with people getting started with REUSE license files as they are now visible in Xcode and no longer require a separate editor.

⚙️ Release Notes

• Migrate groups to folders.

📚 Documentation

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✅ Testing

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📝 Code of Conduct & Contributing Guidelines

By creating and submitting this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.63%. Comparing base (8d45479) to head (9441b37).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #101   +/-   ##
=======================================
  Coverage   86.63%   86.63%           
=======================================
  Files          21       21           
  Lines         688      688           
=======================================
  Hits          596      596           
  Misses         92       92           

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[PSchmiedmayer]

Thank you, a great idea! 🚀