Connect to Chainguard account, only suggest images that user has access to #55
Description
Currently the determination on how to provide convert FROM lines is based on naming conventions and the builtin-mappings.yaml
For example,
echo "FROM eclipse-temurin" | dfc --org=example.com -
--> FROM cgr.dev/example.com/jdk:latest-dev
However, in the example above, if the user does not have an image called "jdk" in their registry, this results in an unusable Dockerfile.
Add a flag such as --auth or --connect (or perhaps make this the default when --org is supplied), which will use the Chainguard SDK to list image repos in the account and only finalize the conversion of a FROM line if the user has access to the image.