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

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

### Context
- **Task**: Creating `convert-python-erlang` skill
- **Used for**: Following the complete workflow from validation to skill creation

### What Worked Well
- **8 Pillars validation** is excellent - caught that Erlang skill was Yellow (5/8) before starting
- **Clear decision framework** for proceeding with warnings vs improving skills first
- **Comprehensive template** with all necessary sections
- **Content requirements table** provided clear quality bar for each section
- **WebSearch guidance** was helpful for finding language-specific patterns
- **Reference to existing skills** (convert-python-rust) accelerated development
- **Step-by-step workflow** was easy to follow and complete

### Suggested Improvements
- [ ] **Add validation checklist** for type mapping tables (primitives, collections, composites)
- [ ] **Include guidance on web search queries** - what specific terms to search for type mappings
- [ ] **Add example search results** showing what good external documentation looks like
- [ ] **Provide pattern for "Limitations" section** when proceeding with Yellow/Red skills
- [ ] **Add guidance on balancing** between referencing existing skills vs creating new examples
- [ ] **Include section on testing generated examples** - how to verify Erlang code compiles

### Additional Notes
- The workflow correctly identified that Erlang was missing serialization, build/deps, and metaprogramming details
- External research filled gaps successfully with py_interface, ErlPort, and Erlang/OTP docs
- The command took approximately 30 minutes to complete thoroughly
- All 10 steps were valuable; none felt redundant

Relates to #211 #205

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