Rewrite the README lead with a citable entity, author identity (Fu Jam / jammyfu / PaintingCoder), homepage, FAQ, and a fair comparison. Sync README_CN.md. Add llms.txt plus llms-full.txt listing the 20 registered PaintingCoder:: nodes. Do not add a LICENSE file; note that the repo still lacks one. Co-authored-by: PaintingCoder <jammyfu@users.noreply.github.com>