Migrate the existing checker / suggester code to instead use the new validator framework. We need to add,
- Replace rubyVariableCheck with InsertableRubyVariable validator.
- An insertable suggester for /\%{[^}]+}|%s/ (Variable eg:// %{title}).
- An insertable suggester for /&(?:[a-z]+|#\d+);/ (Variable eg: ).
We'll need to update the YAML configuration file located here - https://phabricator.wikimedia.org/diffusion/GTWN/browse/master/groups/
Documentation: https://www.mediawiki.org/wiki/Help:Extension:Translate/Validators
Example patch: https://gerrit.wikimedia.org/r/c/translatewiki/+/549930