Establish the www.archline.hu clean-baseline repo. This root commit on main
documents the baseline definition (only our code, deployable) and the
reproducible per-commit reconstruction method used on the build branch.
Signed-off-by: LÁZÁR Imre <imre@illusion.hu>
Assisted-by: claude-code@claude-opus-4-8
Addresses-Issue: https://git.illusion.hu/cadline/infra/issues/47
