Use ImageComparator.ComparisonResult for Calculating Diff Images

[takahirom]

Currently, Roborazzi utilizes ImageComparator.ComparisonResult to determine whether an image has changed. However, the current method for calculating diff images is based on pixel differences. To improve accuracy and consistency, we should adopt ImageComparator.ComparisonResult for the diff calculation process as well.

This change is proposed for the following location in the codebase:

roborazzi/include-build/roborazzi-core/src/commonJvmMain/kotlin/com/github/takahirom/roborazzi/processOutputImageAndReport.kt

Line 88 in bd23cf7

val comparisonResult: ImageComparator.ComparisonResult =