Transforms our step report output to a file format specific to Mayo

To use in dev:

• dotnet run path/to/excel.xlsx

To publish:

• dotnet publish -c Release -r win-x64 --self-contained true -p:PublishSingleFile=true

To use published version:

• drag excel file onto executable, it will generate a file in the same directory as the original file, with -transformed-{timestamp} appended to the name