Add all macros currently supported by MediaWiki

Created by: physikerwelt

Add all macros definitions that are currently available on Wikipedia and related projects. Those additional symbols were introduced in

https://github.com/wikimedia/MathJax/commit/ff2accb8a2dfa5ad03fbd01db52dd1e12c39991e

cf. https://phabricator.wikimedia.org/T105310