Recognise better REGers' contributions to upstream packages

[mhauru]

How do we better recognise and encourage REGers, and maybe Turing people more widely, to contribute upstream? Both in terms of submitting issues and fixing bugs as we find them, and also by favouring building on existing communities packages over starting from scratch ourselves. This is something David L-J brought up in particular as a interest of his, and something I would be keen on as well. As David put it, we want to "disincentivise fragmentation and reinvention (i.e. to encourage contributing to existing non-Turing projects rather than creating new Turing ones each time a new project starts)".

[llewelld]

At RSECon23 @warrickball gave an interesting talk on this topic. He's made the slides available (but the video is still pending).

I'm sure better visibility of external contributions would be one of the more effect ways to help with this, which relates closely to #9.