[Negative progress] <as proxy for conditional formatting - databars like excel>

### Description

Excel has this super cool data bars from conditional formatting..


which also supports negative vlaues..


Your progress bar is a wonderful proxy to achieve same affect (give a plain markdown file, a python snippet could update the numbers column with your proxy as conditional formatting databars).. if you could also support negative numbers, that need would be much more complete.. Kindly consider..

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