Build the fuzzforge-modules-sdk wheel and image and derive
SDK_VERSION from pyproject.toml to use as the base image for other
module builds (passed via --build-arg BASE_IMAGE). Set BASE_IMG_PREFIX
to "localhost/" when using Podman so local images are referenced
correctly. Streamline module loop to skip the SDK dir, require a
Dockerfile, preserve existing "fuzzforge-*" names, and consistently
tag images as fuzzforge-<name>:<version>