Draft: [Proof of concept] Allow MW config vars to be customized
- Add a field to the demo creation form that takes a freeform list of MediaWiki config settings
- Put these settings in DemoSettings.php, and load it at the bottom of LocalSettings.php
TODO:
- Catalyst implementation (only implemented in legacy for now)
- Test legacy implementation
- Consider less freeform, more structured way of setting config vars
Bug: T384975