feat: curated project list with URLs and talk links
124 projects extracted from 120 talks with best-guess project names
and URLs. Each project shows: name (linked to URL if known), play
button to open the talk, and speaker name. JSON file at
apps/data/atmosphere-projects.json is editable for curation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>