Provide build commands to view status and logs

[trisberg]

We need CLI commands to access build info and to view any error logs from a build

riff build list
riff build status square-00001
riff build logs square-00001 --container build-step-build-and-push
riff build logs square-00001 --all

[jldec]

see also #623 - piping logs from successive build steps to stdout and stopping on error simplifies UX by reducing the need to spelunk.

[scothis]

We now have:

• riff application/function list
• riff application/function create <name> --tail
• riff application/function tail <name>