Add CI based metrics

[NightLore]

• whether or not there is a CI workflow
• Mean time to resolution -- mean time from build failure to the next time it takes for build to be green again -- shorter time, the better
• Mean time between failure -- how long does it take to have another red build -- less frequent the better

[bcdasilv]

2020-State-of-Software_Metrics-Report_Final.pdf

[NightLore]

Other references on the potential ability of doing this:

• https://docs.github.com/en/developers/apps/creating-ci-tests-with-the-checks-api
• https://stackoverflow.com/questions/29443528/get-build-status-through-github-api

seems possible, but did not test if the information is what we want (also will probably need a lot more GitHub requests)