Add SwiftUI Expert eval docs

[rforgeon]

Summary

Adds a small harness-neutral eval set for SwiftUI Expert workflows.

What changed

• Add eval cases for Liquid Glass review, list performance, and Instruments trace analysis
• Add a rubric covering reference routing, technical accuracy, diagnostic quality, and privacy boundaries
• Document optional Telvine publishing guidance with metadata-only telemetry events

Validation

for f in evals/*/cases.jsonl; do while IFS= read -r line; do jq -e . >/dev/null <<<"$line" || exit 1; done < "$f"; done
rg -n "Evals and production telemetry|evals/" README.md
git diff --check

[EngOmarElsayed]

What is the use of eval docs ?