[jdev] tickets and merge requests bases on XMPP

[Goffi]

Hello everybody,

I have implemented an experimental ticket/merge request feature in our XMPP 
client (Salut à Toi), and I've just written a blog post about it (with a 
short demo vidéo): https://www.goffi.org/blog/goffi/9555cc02-6a87-4b6b-af85-20f1c0736722

I'm planning to propose protoXEP for the node schema feature used there, 
beside that it's all standard pubsub.


Feedback welcome


Thanks and good day
Goffi