fix creator & deleter, refactor into more helpers

cmd/root.go

go.mod

go.sum

notifications/ephemeral.go

notifications/ephemeral_test.go

notifications/notifications.go

notifications/notifications_test.go

storage/database.go

storage/databaseImpl.go

storage/mapImpl.go

storage/mapImpl_test.go

storage/storage.go

storage/storage_test.go