Rename Questions to Ask -> Task-Specific Questions, remove redundant questions

Since product-marketing-context now captures foundational info (product, audience,
competitors, voice), removed redundant questions from these sections and renamed
them to clarify they are for task-specific context only.

Removed redundant questions from:
- competitor-alternatives (competitors, differentiator)
- copy-editing (audience, brand voice)
- email-sequence (audience)
- free-tool-strategy (product, audience problems)
- marketing-ideas (product, target customer)

Renamed section in all 23 skills with this pattern.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

skills/referral-program/SKILL.md

@@ -584,9 +584,8 @@ Typical findings:
 
 ---
 
-## Questions to Ask
+## Task-Specific Questions
 
-If you need more context:
 1. What type of program are you building (referral, affiliate, or both)?
 2. What's your customer LTV and current CAC?
 3. Do you have an existing program, or starting from scratch?