5 scenarios testing: sequential debugging, Result type + effort config,
test patterns, domain type conventions, and deduplication/repair mechanics.
Also adds tessl-labs/tessl-skill-eval-scenarios dev dependency.
- Add trigger hints and code snippets to both skills
- Add checkpoints after each step
- Extract module reference and troubleshooting into linked files
- Bump codeflash-skills tile to 0.2.0