add script to run screenshot tests together (adobecom#433)

runScreenDiff.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Replace these variables with your actual values
+Config="visual"
+Project="chrome,ipad,iphone"
+
+# Check if category is passed as an argument
+if [ -z "$1" ]; then
+  echo "Usage: $0 <category>"
+  exit 1
+fi
+
+category="$1"
+
+# Run each command one by one
+node run.js -c ${Config} -p ${Project} -g @${category}-screenshots
+node libs/screenshot/merge.js screenshots/${category}
+node libs/screenshot/compare.mjs screenshots/${category}
+node libs/screenshot/uploads3.js screenshots/${category}
+
+echo "All commands executed successfully for category: ${category}!"