Adds installer/Containerfile (a separate Anaconda-webui environment
container, distinct from the quine-linux OS image) plus
build-installer-image/build-installer-iso tasks that drive
bootc-image-builder's bootc-installer type against it. Lets a forked/
patched anaconda-webui (built via COPR) get baked into the install ISO
instead of stock Fedora's.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
