Hey Hashar,
Thanks for looking into this and sharing all the useful info :)
If we want to do it the composer way, MediaWiki should be a standalone
framework that you install under vendor and don't care much about
We probably ought to create a list of the blockers for this. One item on it is going to be global scope assumptions through core and extension initialization code. Which is unfortunate, as it is probably going to take a while before that one is fully fixed.
Cheers
-- Jeroen De Dauw http://www.bn2vs.com Don't panic. Don't be evil. ~=[,,_,,]:3 --