More meaningful presentation of metrics

[snadi]

Check how the metrics are presented on the website and try to mimic as much as possible, given the limited space. For example, saying "25 changes" for backwards compatibility is not clear. Maybe avg 25 breaking changes/release? Check for all metrics

[snadi]

@relhajj

The screenshot in PR#38 still says X Breaking Changes.. can we somehow incorporate (/release) or (per release)?

Also, I don't see what changed. For example, security and performance still just saw a percentage rather than maybe

Security (% of related issues) ... 28%

or

Security .... 28% of issues are Securyt-related (simialr to website but that's long for plugin)

I still see that many numbers are not self-explanatory. Can you check the website https://smr.cs.ualberta.ca/comparelibraries/domain/?domain=databases