As a wikit implementer I want to be able to define my own fonts in order to tie in wikit to already existing frontends.
Problem:
Wikit currently does not allow overwriting its default fonts. This causes an issue with implementation in wikis that use skins other than minerva neue.
Example:
see T313166
Acceptance criteria:
- wiki allows overwriting of its default fonts
Notes:
- Michael suggested a solution in T313166#8090807, which is to use sas mixins to overwrite the font families.