v0.9.3 — Smaller README, Evidence column, runnable Quick Start

• README landing page is smaller (27 KB → 21 KB): the 15 case-study <details> blocks are now one table row each, with the full write-up in examples/.
• README "Real-World Results" and "Tooling Measured Results" gain an Evidence column (measured, estimated, single run, qualitative). The unsourced "100x faster", "100% tool consistency" and "100+ skills" claims are reworded or marked as observed, not measured, in the README, skill-tooling-pattern.md and examples/index.md.
• Quick Start is now three runnable steps built on claude-md-lint.py, replacing a grep of private paths and two comment-only steps.
• BACKLOG.md: re-review adds seven items (B-007, B-008, B-017, B-018, B-027, B-028, B-029) and reprioritizes; five items shipped. GitHub topics and homepage are now set.