feat: optimize all 32 skill descriptions for better triggering

Following Anthropic skill-creator guidance that Claude undertriggers
skills, make descriptions pushier across all 32 skills:

- Add casual/frustrated user phrases
- Add implicit need triggers where users need the skill but dont name it
- Add catch-all sentences explaining when to use
- Add missing cross-references between related skills
- Ensure consistent format across all descriptions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/copywriting/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: copywriting
-description: When the user wants to write, rewrite, or improve marketing copy for any page — including homepage, landing pages, pricing pages, feature pages, about pages, or product pages. Also use when the user says "write copy for," "improve this copy," "rewrite this page," "marketing copy," "headline help," or "CTA copy." For email copy, see email-sequence. For popup copy, see popup-cro.
+description: When the user wants to write, rewrite, or improve marketing copy for any page — including homepage, landing pages, pricing pages, feature pages, about pages, or product pages. Also use when the user says "write copy for," "improve this copy," "rewrite this page," "marketing copy," "headline help," "CTA copy," "value proposition," "tagline," "subheadline," "hero section copy," "above the fold," "this copy is weak," "make this more compelling," or "help me describe my product." Use this whenever someone is working on website text that needs to persuade or convert. For email copy, see email-sequence. For popup copy, see popup-cro. For editing existing copy, see copy-editing.
 metadata:
   version: 1.1.0
 ---