[Feature]: MarkerBar rangeColor prop

[NicHaley]

What problem does this feature solve?

I would like to use the MarkerBar chart for the following scenario:

• I would like to have the chart function ostensibly like a ProgressBar, but with a Marker on top

My real world use-case for this is to indicate a company's token usage over the course of a month, with the marker indicating the day of the month. This would make it easy to visualize whether they are ahead of behind their monthly usage allotment.

I can basically handle this use-case already, except for the fact the range color isn't configrable. If there was just an option for that it would be great.

What does the proposed API look like?

rangeColor