Add TikTok/Reels/Shorts frameworks: 3-second rule, video structures,
caption best practices, content ideas by business type. Detailed hook
library, scripting template, audio/visual strategy in reference file.
Inspired by #200 (vendor-neutral parts only).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Corey Haines