feat: added PostCSS plugin

[mfranzke]

Description

By providing a PostCSS plugin we could enhance the usage of this polyfill.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring

Testing

• Tests pass locally
• Added tests for new functionality
• Updated existing tests
• Manual testing completed

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

Browser Testing

If applicable, please test in the following browsers:

• Chrome
• Firefox
• Safari
• Edge

Performance Impact

If this change affects performance:

• I have run performance benchmarks
• Performance impact is documented
• Performance regression is acceptable for the added functionality

Breaking Changes

If this introduces breaking changes, please describe:

Additional Notes

Any additional information that reviewers should know.

[changeset-bot]

🦋 Changeset detected

Latest commit: 073fd68

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
css-if-polyfill	Patch
postcss-if-function	Minor

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[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.60ms	✅
Avg Processing Time	0.2668ms	✅
Total Processing Time (1000x)	266.80ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.50ms	✅
Avg Processing Time	0.2580ms	✅
Total Processing Time (1000x)	258.00ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.50ms	✅
Avg Processing Time	0.2764ms	✅
Total Processing Time (1000x)	276.40ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.50ms	✅
Avg Processing Time	0.2081ms	✅
Total Processing Time (1000x)	208.10ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.40ms	✅
Avg Processing Time	0.2601ms	✅
Total Processing Time (1000x)	260.10ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.30ms	✅
Avg Processing Time	0.2657ms	✅
Total Processing Time (1000x)	265.70ms	ℹ️

✅ All benchmarks passed!

[github-actions]

🚀 Performance check completed! Check the summary for details.

[github-actions]

🚀 Performance Benchmark Results

Metric	Value	Status
Initialization Time	0.50ms	✅
Avg Processing Time	0.2433ms	✅
Total Processing Time (1000x)	243.30ms	ℹ️

✅ All benchmarks passed!