Add root config.json (Hub download-stats query file + framework pointer)

E4B QAT gather tables (PLE int8 per-row dump + scales)

E4B QAT int4lin tbl bundle (Mac 55.8 tok/s)

E4B QAT provider bundle, precompiled h18p .aimodelc

E4B official-QAT int4lin provider bundle (Mac 53.2, iPhone 15.1 tok/s)

E4B card: official-QAT int4 pipelined bundles

initial commit