e45130d31b
The new `--new` or `-n` flag allows to create a new revision after the single revision being described. Running `jj-cz --new` is the equivalent of running `jj-cz @ && jj new`. Running `jj-cz --new xs` is the equivalent of running `jj-cz xs && jj new xs`. Passing several revisions to `jj-cz` with the `--new` flag will result in an error. Refs: #6