JSON files should have "Name" parameter to override filename

To facilitate the renaming of objects in Jamf, JSON objects on disk should allow for a "name" parameter (or similar) that overrides the filename when matching to Jamf. This should not be included when syncing Jamf->Disk for the following reasons:
1. We don't want to have to deal with scanning all the JSON objects on disk to find a matching "name" to sync to
2. It's fine if we end up with a duplicate in part because:
3. We should implement and use a `prune()` method to remove orphaned items.