Diff two orbs from the CLI
`circleci orb diff <ref-from> <ref-to>`
We could have this be a straight code-diff like `git diff`, but the idea here is more to take advantage of our semantics to show more structured information about what changed.
For instance, output could be like this:
jobs: +1 + somejob commands: +2 + somecommand + someothercommand executors: -1 - someexecutor changed-parameters: +2 -1 + foobar in job jobbyjob + baz in job jobbyjob - thingy in executor someexecutor changed-jobs: 1 jobbyjob + executor default - executor someexecutor changed-commands: 2 mycommand: + 3 steps - 2 steps