revup commit/amend populates topic and other lines for you

[jerry-skydio]

Add -m --message flag that sets the base message text for you. Implies --no-edit and requires --insert (or commit).

Add --new-topic -t flag that takes in str and appends a topic line to the message, requires --insert

Add --same-topic flag that appends a topic line with the same as the most recent topic

Add a --relative flag that appends a relative line with the same as the most recent topic. Also copies reviewers and labels from that topic.