Feature request: Threshold to Percentage
Hello,

Thanks for creating `mosdepth`. I just started using it. However, I have a feature request if possible.

The `-T --thresholds <value>` is a really nice addition to the tool but I don't see the option to output the values as a percentage. For example, if we have 100 base pairs, and 20 are covered in 10X, we would see 20% instead of a number.

Is this possible to have?

Thank you !