feedback(/create-lang-conversion-skill): from convert-python-fsharp creation

## Feedback: /create-lang-conversion-skill

### Context
- **Task**: Creating `convert-python-fsharp` skill
- **Used for**: Complete workflow guidance from validation through PR creation
- **Related PR**: #266

### What Worked Well

1. **Comprehensive workflow structure**: The step-by-step process from argument validation → research → creation → validation → commit is very clear and complete
2. **8 Pillars validation**: Excellent addition in Step 2.5 - validates both source and target language skills have adequate coverage before creating conversion skill
3. **Content requirements table**: Specific minimums for each section (e.g., "10 entries" for Quick Reference, "5-10 patterns" for Idiom Translations) provide clear quality targets
4. **Example complexity guide**: The table with lines/concepts/purpose for Simple/Medium/Complex examples is very helpful
5. **Self-review mechanism**: Step 10 creates a feedback loop that improves the ecosystem over time

### Suggested Improvements

- [ ] Add guidance on when to use `WebSearch` vs relying solely on existing skills - I used WebSearch for Python-F# specifics and found Fable.Python transpiler info
- [ ] Include template for "Limitations" section - useful when proceeding with Yellow/Red pillar coverage
- [ ] Add suggestion to check for transpilers/interop tools (e.g., Fable.Python for F# → Python) as they provide valuable insights for the reverse direction
- [ ] Consider adding a "Research checklist" for Step 3 to ensure consistent coverage areas
- [ ] Add guidance on handling .NET/CLR-based target languages (F#, C#) vs other ecosystems

### Additional Notes

The command workflow is excellent overall. The 8 Pillars validation is particularly valuable - it caught that F# skill lacks a dedicated module system section (scattered in examples). This informed the conversion skill's content.

The progression from reading foundation skills → validation → research → creation → validation → feedback creates a robust quality assurance process.

Relates to #211

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Feedback from: `/create-lang-conversion-skill python fsharp`