Replace the stale two-paper list (kempe_style_search_for_smaller_contradiction
and plane_depth_labelling -- neither in the repo) with a table of the
12 papers actually present under papers/, with titles pulled from each
paper.tex. Also clarify that init_paper creates papers/<name>/ rather
than a top-level directory.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>