To help with development and testing, we should add two feature flags:
- $wgTemplateDataEnableFeaturedTemplates T392896: Add a community-configurable list of "useful templates" to a tab in the template picker
- $wgTemplateDataEnableCategoryBrowser T392553: Template discovery: browse templates by category
A temporary ?enablediscovery URL flag should also be added, having equivalent functionality to $wgTemplateDataEnableCategoryBrowser, to make it easier to demo in production. This is seen as a small risk as the category browser doesn't modify any data and can be turned off again at any point.
We currently have all of this behind $wgTemplateDataEnableDiscovery (which, once the above are implemented, would then only be enabling the core template discovery functionality and the template favouriting feature)