How to define chat provider in profile?

I am running a first server that could be used as chat provider at

See the previous post about a proposal to add the protocol

App developers should now be able to lookup the user’s chat provider, but there is now place yet there. How to add it?

I think chat is essential enough to give it a proper place in the blockstack stack next to storage provider. Is there a formal way to make such a proposition?

For app developers wanting to use chat now they can