docs: improve README with agent guide, FAQ, and fix component counts
- Fix inaccurate counts: 13 agents (was 15+), 34 skills (was 30+), 31 commands (was 30)
- Add "Which Agent Should I Use?" decision table with common workflows
- Add FAQ section addressing top recurring issues (hooks, context window, cross-platform)
- Add 5 missing skills and 7 missing commands to directory tree listing
- Expand code-reviewer agent with React/Next.js, Node.js patterns, and confidence filtering
- Add real-world SaaS example (Next.js + Supabase + Stripe) in examples/
Affaan Mustafa