enh(io): add image for addDistance test in sightvieweguitest
Description
A new test for distance addition is being added to sightViewerGuiTest, and a snapshot is needed for comparison.
Proposal
add a snapshot sightViewerAddDistanceTest.png
to ./sight/ui/SoghtViewer/
Technical specifications
add sightViewerAddDistanceTest.png
to the directory and make sure it is lfs tracked before pushing