Improve signposting for destructive actions

[raddevon]

migrate is an example of a destructive command that doesn't currently ask for confirmation. Maybe it should, and we could offer a --non-interactive option so that it can still be used in scripts. We should do an audit of other commands that could also benefit from this change and make it across those as well.

Related request: display current branch name with better visibility — maybe bold and in a color?