Machine-readable output from `azd deploy`

Currently the `azd deploy` command does not offer much in the way of machine-readable output. You can do `--output json`, but that just produces JSON-lines output of the console messages, followed by one non-single-line JSON object at the end. Parsing would be difficult and would have to rely too much on fragile heuristics.

/cc @puicchan @wbreza @alexweininger @nturinski

I am interested to hear what ideas folks have about what information to present to the user, and how to present it. It probably depends on the resource type being deployed.