feat: papers voice guide + plork abstract rewrite in @jeffrey voice
- papers/VOICE.md: prose style guide for AC papers — lowercase, direct,
first person, em dashes, honest limitations, quiet conviction
- plork abstract: rewritten in first person, shorter sentences, more direct
("I think this is the way out" not "we propose an alternative")
- plork intro: tightened closing paragraph
- cards-convert: content stays in sync — same source, never divergent
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>