Function render_map 

pub fn render_map(map: &AuthorityMap, term_width: usize) -> String

Render the authority map as a formatted table string.

term_width controls column-group pagination. Authority columns are packed left-to-right into groups narrow enough to fit; each group is emitted as a separate mini-table with a “(columns M–N of T)” label. Pass usize::MAX to disable pagination.