feat: cards template — CJK translation labels, OLPC table fix
- ac-paper-cards.sty: add \accjk font (Droid Sans Fallback) for CJK labels
- cards-convert.mjs: wrap zh/ja/ko translation labels with \accjk font
- cards-convert.mjs: use native script for Chinese (中文) and Japanese (日本語)
- plork.tex: fix OLPC table overflow — switch to p{} columns with \footnotesize
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>