Add bgtask to print GitHub statistics (would that be accepted?)

[Sean-Der]

I would like to emit a count of open issues/PRs to #pion. My hope is that if people see the work that is available it will encourage more people to get involved!

I can write it in a general way so people can submit their own queries. I want to do the following queries. Would be nice to share the link, a label and the count.

• https://github.com/search?q=is%3Aopen+type%3Aissue+org%3Apion
• https://github.com/search?q=is%3Aopen+type%3Apr+org%3Apion