Feat/blend images

[TechyDaniel]

Description

• Image blending feature added

Fixes # (issue)

• enforcing the user to use same color mode canvas and colors.

Type of change

Please delete options that are not relevant.

• [ x] Bug fix (non-breaking change which fixes an issue)
• [x ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x ] This change requires a documentation update

How Has This Been Tested?

Unit tests

Checklist

• [x ] I confirm that the changes meet the user experience and goals outlined in the design plan (if there is one).
• [x ] My code follows the style guidelines of this project
• [ x] I have performed a self-review of my code
• [ x] I have commented my code, particularly in hard-to-understand areas
• [ x] I have made corresponding changes to the documentation
• [ x] I have updated any version info, if necessary.
• [ x] My changes generate no new warnings
• [ x] I have added tests that prove my fix is effective or that my feature works
• [ x] New and existing unit tests pass locally with my changes

Task: TECHART-332

[Olaf-Wolf3D]

fix failing test