README now documents all features, 14 config keys, full CLI reference,
keyboard shortcuts, platform support, and project structure. Previous
README covered ~40% of actual functionality. Added docs/plans/README.md
noting these are historical ADRs from the initial build.
Added 9 new README tests verifying all settings keys are documented,
clipboard features, keyboard shortcuts, auth modes, platform support,
ANSI previews, hover preview, and view modes.
- Config file (settings.json) becomes source of truth for serve options
- Replace install-service with muxplex service <command> subgroup
- Clean up CLI structure (upgrade/update alias, serve flag precedence)
- Thin wrappers over systemctl/launchctl for install/uninstall/start/stop/restart/status/logs
- Backward compat: install-service remains as deprecated alias