feat: Add duplicate combination script and update README#1875

Atul-LNG merged 3 commits intoServiceNowDevProgram:mainServiceNowDevProgram/code-snippets:mainfrom

JohanDC-1999:feature/background-script/find-duplicates-compositeJohanDC-1999/code-snippets:feature/background-script/find-duplicates-compositeCopy head branch name to clipboard