This commit introduces some boilerplate for emitting warnings from the
AbuseFilter parser, and also code for showing these warnings in the ace
editor. Adding new warnings should be as simple as appending to
AbuseFilterParser::warnings (and adding the relevant i18n).
Bug: T264768
Bug: T269770
Change-Id: Ic11021b379f997a89f59c8c0572338d957e089a6
Just moving code around. Without a unit test because DI
coverage of change tags in core isn't available yet.
Change-Id: Iac861e1e24dae13581b8d9173357a1d6c94be88a
This moves a lot of things away from the AbuseFilter class. There's a
nasty static dependency on ChangeTags, but it's very limited anyway, and
it's going to be fixed once T245964 is resolved.
Change-Id: Ia7df4b4d3289c2722323f59ceecf3fdd38277785
