This is important for distributed settings, and will make merging
databases much simpler. This change is pretty extensive and includes a
lot of other stuff like moving some fields between tables, and
introducing the `local_metadata` table which is a key-value store and
holds the uuid of the "local" store, i.e. the one corresponding to the
directory holding that particular nancy.db.
This uses colorama so that is added to poetry. Next I'll add the diff
printing to the record command and have the corresponding store method
use the diff as input.
