Add TRELLIS.2 as a library

[NielsRogge]

Summary

• Add trellis2 to the model library UI metadata so models tagged with library_name: trellis2 can report library download stats: https://huggingface.co/models?other=trellis2
• Count downloads using path_extension:"safetensors", matching the checkpoint files under ckpts/ in microsoft/TRELLIS.2-4B.

Test plan

• pnpm --filter @huggingface/tasks format:check
• pnpm --filter @huggingface/tasks lint:check

Made with Cursor

---

Note

Low Risk
Low risk: adds a new entry to the model library UI metadata and download-count query without touching core logic or security-sensitive code.

Overview
Adds a new trellis2 entry to MODEL_LIBRARIES_UI_ELEMENTS so models tagged with library_name: trellis2 display the TRELLIS.2 library metadata and have downloads counted via the path_extension:"safetensors" query.

^{Reviewed by Cursor Bugbot for commit 3e6ebd4. Bugbot is set up for automated code reviews on this repo. Configure here.}