Code coverage..

[bevanweiss]

Now that the build has code coverage being instrumented, it would be great if there was a nice 'dashboard' presented for it during pull requests / just as a badge on the README.md or similar.

I had a go at it, but it looks like the Github action permissions got tightened down in March 2023. So needs to be split into two workflows. I do have this working now in my fork. But I think that perhaps just going with a more out of the box solution might be better... it seems that CodeCov is popular (and free for public open source repos)
https://about.codecov.io/pricing/

It also seems easy enough to add in. Create a custom application key, then call the CodeCov upload action.