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>
Per Anthropic's Agent Skills best practices, reference files over
100 lines should include a TOC so Claude can see full scope when
previewing with partial reads. Added ## Contents section to all
32 reference files.