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/launch-strategy/SKILL.md

@@ -330,9 +330,8 @@ Even small changelog updates remind customers your product is evolving. This bui
 
 ---
 
-## Questions to Ask
+## Task-Specific Questions
 
-If you need more context:
 1. What are you launching? (New product, major feature, minor update)
 2. What's your current audience size and engagement?
 3. What owned channels do you have? (Email list size, blog traffic, community)