weft-deploying

Read when the user wants weft or a program live for real people on their cloud, asks about prod, a target, `--on`, a domain or GCP, or a deploy failed: targets and logging in, domains, the deploy workflow `weft ci add` writes, handing it its settings with `weft target export`, a project's frontends (`weft frontend`), what a cloud build is and how it fails, rolling back, and connections on a cloud install. The deployer specialist reads it; you read it before dispatching one.