looong time ago - ~2005 maybe? - the late Pieter Hintjens told me about such overarching idea including whole project management and all related ping-pongs - code, data, documents, issues, e-mails, chats, everything - think like one laptop for this project and different one for that project - and that they had at the time approached something like that, and got it mostly working, over linux etc. But AFAIK it never went public and has been abandoned.
So the field is ripe for whoever wants to try... though now same accounts to XYZ are being used for hundred things..