feat(status): allow quick diffing of the current state vs repo state

[echocrow]

we have snapshot to store and apply to restore state. would be nice to see what (if anything) is currently different between the current machine state and what's been captured in the repo

TBD if this is actually needed. technically could be done throwing the latest snapshot into the repo, and reviewing the working copy there. (only fully works if working copy was previously empty)