Add buildTree to mirror how TTS nests objects, with a display label
(Nickname or class Name). Generalize traverseMod to descend into any
object with ContainedObjects, not just bags, and add Nickname to
TTSObject.
Add fetchModFromUrl/fetchModFileFromUrl and accept a fileUrl query param on /items routes so the frontend can download saves directly from a search result's file_url, with no key required.
hypercross