Add Onboarding Tests

[YurenSUN]

Add Onboarding Tests

♻️ Current situation & Problem

Currently, we are missing code coverages for the onboarding flow. Therefore, this PR resued the onboarding flow tests from the Spezi template App, modified, and add additional functions tailored to our App to have the onboarding flow covered.

⚙️ Release Notes

• Add tests for onboarding flow.
• Quickly check whether the licensing is displayed as expected.
• Fix a small bug so the page asks for the notification permission will not show anymore once the notification is enabled.

📚 Documentation

Related comments are added to the test codes.

✅ Testing

This PR only adds tests to the existing App.

📝 Code of Conduct & Contributing Guidelines

By submitting creating 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 83.07%. Comparing base (f040e27) to head (ca14b12).

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #58       +/-   ##
===========================================
+ Coverage   54.95%   83.07%   +28.12%     
===========================================
  Files          54       54               
  Lines        2990     2993        +3     
===========================================
+ Hits         1643     2486      +843     
+ Misses       1347      507      -840     

Files	Coverage Δ
PICS/Onboarding/OnboardingFlow.swift	97.50% <100.00%> (+0.21%)	⬆️
PICS/PICSDelegate.swift	95.24% <100.00%> (ø)

... and 30 files with indirect coverage changes

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[czhang771]

Great work!