Rebrand TRL-Arena -> TRL-Bench: fix README/NOTICEs, add TaBERT coverage + paper links, add missing turl config.json

TaBERT: add NOTICE with citation + non-commercial caveat

TaBERT: add CC BY-NC 4.0 LICENSE notice

Upload TaBERT base k3 version.txt

Upload TaBERT base k3 tb_config.json

Upload TaBERT base k3 checkpoint (CC BY-NC 4.0 — non-commercial use only)

Initial mirror: TUTA (MIT) + TURL (Apache-2.0) with LICENSE/NOTICE

initial commit