docs: add Apache-2.0 LICENSE per s4(a)

docs: add NOTICE attribution per Apache-2.0 s4(d) (code AND weights)

docs: acaua mirror model card with upstream provenance (code + weights)

config: add rtmo config with COCO-17 keypoint_names + skeleton

weights: pure-PyTorch port of mmpose RTMO-s body7, converted from 759b39c1 via scripts/convert_rtmo.py

initial commit