Umbrella task for the work around the list-building tool.

• Tool: https://list-building.toolforge.org/
• Documentation: https://meta.wikimedia.org/wiki/Research:List_building_for_campaigns

This largely involves two components:

• Receiving feedback from organizers and deciding how to address that feedback (bug fixes, new features, etc.), which will largely be logged here for now: https://github.com/geohci/list-building-interface/issues
• Improving the back-end (generation of embeddings; nearest-neighbor lookups; etc.): T341988