feat: PHP 8.4 support

[robaimes]

Pull Request Template

Thank you for contributing to the Satoshi Theme! Please provide the following information about your changes:

Summary

Fix class and method signatures to be compatible with PHP 8.4.

Type of Change

Please check the relevant option:

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

Related Issues

• Fixes Not compatible with PHP 8.4 #300

Changes Made

• Fix nullable properties signatures, prepending ? when necessary
• Reorganised

Testing

Please describe how you tested your changes:

• Tested in development environment
• Tested on desktop browsers
• Tested on mobile devices
• Performance impact evaluated
• Cross-browser compatibility checked

Test Environment

Magento Version: 2.4.8-p2 and 2.4.8-p3
Hyva Theme Version: 1.3.15 and 1.3.21
PHP Version: 8.4.14
Testing Browsers: Chrome

Screenshots/Videos

If applicable, add screenshots or videos demonstrating the changes.

Performance Impact

• No performance impact
• Performance improvement
• Potential performance impact (please explain)

Documentation

• Code is self-documenting
• Added/updated inline comments where needed
• Updated README.md (if applicable)
• Updated CONTRIBUTING.md (if applicable)

Checklist

Please confirm you have completed the following:

• My code follows the project's coding standards
• I have performed a self-review of my code
• I have tested my changes thoroughly
• My changes do not introduce any new warnings or errors
• I have updated documentation where necessary
• I have checked that my changes work with the latest Hyva theme version

Additional Notes

Technically, this introduces some breaking changes in the form of parameter reogranisation. Some optional parameters were being added before required ones which have been fixed.