Add SwiftUI Binding Negation

[philippzagar]

Add SwiftUI Binding Negation

♻️ Current situation & Problem

We currently use the negation of a SwiftUI Binding in lots of different Spezi modules.
Each module needs to define the Binding extension on their own.

⚙️ Release Notes

• Adds a SwiftUI Binding Negation

📚 Documentation

Proper documentation of added code

✅ Testing

No test cases added

📝 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

Attention: Patch coverage is 0% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 79.48%. Comparing base (d49f716) to head (a012d0f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
- Coverage   79.87%   79.48%   -0.39%     
==========================================
  Files          39       40       +1     
  Lines        1222     1228       +6     
==========================================
  Hits          976      976              
- Misses        246      252       +6     

Files	Coverage Δ
Sources/SpeziViews/Utilities/Binding+Negate.swift	0.00% <0.00%> (ø)

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[PSchmiedmayer]

Thank you; looks great!

[philippzagar]

@PSchmiedmayer Please force-merge the PR, I didn't do testing for this one as it's really basic functionality