refactor: clean main to starter template — remove project-specific and generated files
- Remove project-specific commands: booking, blog, commerce, landing-page, feature, hotfix
- Remove project-specific skills: booking, blog, ecommerce
- Remove generated files: EVOLUTION_LOG, WORKFLOW_AUDIT, logs/, reports/
- Add .gitignore entries for auto-generated dirs (.kilo/logs/, .kilo/reports/)
- Remove e2e_booking_flow from capability-index.yaml
- Remove docker/evolution-test/ (dev infra, not starter)
- Genericize AGENTS.md project description
- Genericize tests/README.md title
All removed content preserved on dev branch.
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