- move apps menu from inline lxs.sh function to apps/index.sh
- add tools/index.sh as entry point for tools menu
- rename system-tools.sh to system-infos.sh
- simplify help text to point users to the interactive menu
- update README directory tree to reflect new structure
- add main entrypoint with interactive menu and CLI dispatcher (lxs.sh)
- add shared helpers library with colors, loggers, and spinner (lib/common.sh)
- add app installers for coolify, pterodactyl, uptime-kuma, cloudpanel, and proxmox (apps/)
- add system tools for monitoring, benchmarking, and hardening (tools/)
- add VERSION file (0.1.0) as single source of truth for releases
- add MIT LICENSE
- expand README with usage, project structure, and release workflow