* add jsonDebug, MinimumPrintable to interface
We want to optionally print print either debugging
(containing all internal data) or user-friendly json
outputs. This requires a new flag: json-debug, and
an extension to the Print interface: minimumPrintable.
embedding a baseModel means that objects like backup
have a backup.StableID, but no backup.ID nor backup.
backupID. This could be confusing for users. This change
swaps the value and type names, so that baseModels
include an ID value of type StableID.
* store backup operation results in the backup manifest
Adds backup operation metadata like the outcome
statistics and selector definitions to the backup manifest
entry. These additional details will appear when users
call `corso backup list`.
