Fix checking focusMode instead of zoomMode

[WilliamWelsh]

Summary

zoomMode is checking focusMode instead of zoomMode, making it copy focusMode state instead of being independent

How did you test this change?

By running locally

[Copilot]

Pull Request Overview

This PR fixes a bug where the zoomMode was incorrectly using the focusMode value, ensuring that zoomMode is now independently determined.

• Changed the reference in the zoomMode check from focusMode to zoomMode.

Comments suppressed due to low confidence (1)

ios/ReactNativeCameraKit/CKCameraViewComponentView.mm:227

• The code now correctly checks zoomMode instead of focusMode. Please verify that all other usage of focusMode and zoomMode remains consistent and that this change doesn't affect related functionality.

        _view.zoomMode = [zoomMode isEqualToString:@"on"] ? CKZoomModeOn : CKZoomModeOff;

[scarlac]

Thank you for that very precise contribution @WilliamWelsh!