README:
- Quick Start shows kappa add workflow instead of manual configs
- New features: indexed repos, env operators (+=, ?=), conflict reporting
- Updated subcommand table (add, remove, index, validate-index)
- Repo maintenance section (kappa index)
- Link to STYLEGUIDE.md, test counts, CI info
CONTRIBUTING:
- Updated test counts (30+23+85 instead of 31+23)
- Added test-full.sh to mandatory test suite
- Referenced STYLEGUIDE.md in PR requirements
- Updated good-first/ambitious issues for current state