Feat(BooleanType): Implement BooleanType constraint and validator

[edevsh]

Summary

• Add unit tests for boolean type validator
• Implement boolean type constraint and validator

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation

Testing

• Tests pass (vendor/bin/phpunit)
• Static analysis passes (vendor/bin/phpstan analyse)
• Code generation works (./bin/blugen generate)

Checklist

• Code follows PSR-12 standards
• Added/updated tests as needed
• No breaking changes (or documented)

[codecov]

Codecov Report

❌ Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...x/Constraints/BooleanType/BooleanTypeValidator.php	90.90%	1 Missing ⚠️

❌ Your project status has failed because the head coverage (39.45%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Files with missing lines	Coverage Δ	Complexity Δ
...x/Constraints/BooleanType/BooleanTypeValidator.php	90.90% <90.90%> (ø)	5.00 <5.00> (?)

... and 1 file with indirect coverage changes

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