Add ability to change badge + health indicator thresholds

[irongut]

Feature Request

Add an optional parameter that allows changing the coverage thresholds for the different colours of badge & health indicator.

Expected Behaviour

• Parameter will take 1 or 2 values separated by a space.
• If only 1 value is present it specifies the new lower threshold below which the badge is red, default 50%.
• If 2 values are present the first specifies the new lower and the second is the new upper threshold above which the badge is green, default 75%.

Additional Context

Linked To

#14 Add a health indicator for each package
#16 Add ability to fail a workflow