feat: workflow usage

[PoorlyDefinedBehaviour]

• Adds a query to fetch a summary of the workflow usage

Part of https://github.com/grafana/hosted-grafana/issues/2556 Closes https://github.com/grafana/hosted-grafana/issues/4407 Related https://github.com/grafana/github-datasource/issues/105 (i don't know if this PR is enough to close the issue because it is hard to get the data we need from the GitHub api due to rate limits.)

[PKatBK]

when will this be implemented?

running latest (grafana/grafana:main) image and can not see workflows

[zoltanbedi]

@PKatBK you need to update the plugin to see this. Also try to scroll down it might be there at the bottom.

[richgreen-moj]

Has anyone worked out how to add multiple workflows into one panel? I've managed to do that using a transformation but I can't tell which workflow each row applies to...